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Finding the Fourth Proportional to 11,909,489.80, 17,864,234.70 and 10,901,720.20

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Solution

The fourth proportional to 11,909,489.80, 17,864,234.70 and 10,901,720.20 is: 16,352,580.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,909,489.80 : 17,864,234.70 = 10,901,720.20 : x
  2. Step 2: Convert to fraction form
    11,909,489.80/17,864,234.70 = 10,901,720.20/x
  3. Step 3: Cross multiply
    11,909,489.80x = 17,864,234.70 × 10,901,720.20
  4. Step 4: Simplify right side
    11,909,489.80x = 194,750,888,286,530.91
  5. Step 5: Solve for x
    x = 194,750,888,286,530.91/11,909,489.80
  6. Step 6: Final answer
    x = 16,352,580.30

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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.