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Finding the Fourth Proportional to 9,980,912.80, 14,949,250.80 and 7,729,751.20

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Solution

The fourth proportional to 9,980,912.80, 14,949,250.80 and 7,729,751.20 is: 11,577,497.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980,912.80 : 14,949,250.80 = 7,729,751.20 : x
  2. Step 2: Convert to fraction form
    9,980,912.80/14,949,250.80 = 7,729,751.20/x
  3. Step 3: Cross multiply
    9,980,912.80x = 14,949,250.80 × 7,729,751.20
  4. Step 4: Simplify right side
    9,980,912.80x = 115,553,989,310,400.97
  5. Step 5: Solve for x
    x = 115,553,989,310,400.97/9,980,912.80
  6. Step 6: Final answer
    x = 11,577,497.13

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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.