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Finding the Fourth Proportional to 7,727,985.60, 11,591,978.40 and 6,477,604.80

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Solution

The fourth proportional to 7,727,985.60, 11,591,978.40 and 6,477,604.80 is: 9,716,407.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,727,985.60 : 11,591,978.40 = 6,477,604.80 : x
  2. Step 2: Convert to fraction form
    7,727,985.60/11,591,978.40 = 6,477,604.80/x
  3. Step 3: Cross multiply
    7,727,985.60x = 11,591,978.40 × 6,477,604.80
  4. Step 4: Simplify right side
    7,727,985.60x = 75,088,254,925,336.31
  5. Step 5: Solve for x
    x = 75,088,254,925,336.31/7,727,985.60
  6. Step 6: Final answer
    x = 9,716,407.20

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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.