Home / 12,379,392,000.80-18,569,088,001.20-7,971,407,770.40

Finding the Fourth Proportional to 12,379,392,000.80, 18,569,088,001.20 and 7,971,407,770.40

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Solution

The fourth proportional to 12,379,392,000.80, 18,569,088,001.20 and 7,971,407,770.40 is: 11,957,111,655.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379,392,000.80 : 18,569,088,001.20 = 7,971,407,770.40 : x
  2. Step 2: Convert to fraction form
    12,379,392,000.80/18,569,088,001.20 = 7,971,407,770.40/x
  3. Step 3: Cross multiply
    12,379,392,000.80x = 18,569,088,001.20 × 7,971,407,770.40
  4. Step 4: Simplify right side
    12,379,392,000.80x = 148,021,772,382,007,099,392
  5. Step 5: Solve for x
    x = 148,021,772,382,007,099,392/12,379,392,000.80
  6. Step 6: Final answer
    x = 11,957,111,655.60

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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.