Home / 12,439,657,517.60-18,659,486,276.40-7,790,611,649.60

Finding the Fourth Proportional to 12,439,657,517.60, 18,659,486,276.40 and 7,790,611,649.60

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Solution

The fourth proportional to 12,439,657,517.60, 18,659,486,276.40 and 7,790,611,649.60 is: 11,685,917,474.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439,657,517.60 : 18,659,486,276.40 = 7,790,611,649.60 : x
  2. Step 2: Convert to fraction form
    12,439,657,517.60/18,659,486,276.40 = 7,790,611,649.60/x
  3. Step 3: Cross multiply
    12,439,657,517.60x = 18,659,486,276.40 × 7,790,611,649.60
  4. Step 4: Simplify right side
    12,439,657,517.60x = 145,368,811,160,473,190,400
  5. Step 5: Solve for x
    x = 145,368,811,160,473,190,400/12,439,657,517.60
  6. Step 6: Final answer
    x = 11,685,917,474.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.