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Finding the Fourth Proportional to 12,909,479.01, 17,815,472.99 and 7,108,468.35

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Solution

The fourth proportional to 12,909,479.01, 17,815,472.99 and 7,108,468.35 is: 9,809,902.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909,479.01 : 17,815,472.99 = 7,108,468.35 : x
  2. Step 2: Convert to fraction form
    12,909,479.01/17,815,472.99 = 7,108,468.35/x
  3. Step 3: Cross multiply
    12,909,479.01x = 17,815,472.99 × 7,108,468.35
  4. Step 4: Simplify right side
    12,909,479.01x = 126,640,725,854,152.52
  5. Step 5: Solve for x
    x = 126,640,725,854,152.52/12,909,479.01
  6. Step 6: Final answer
    x = 9,809,902.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.