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Finding the Fourth Proportional to 13,608,903.80, 20,413,355.70 and 11,761,326.20

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Solution

The fourth proportional to 13,608,903.80, 20,413,355.70 and 11,761,326.20 is: 17,641,989.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,903.80 : 20,413,355.70 = 11,761,326.20 : x
  2. Step 2: Convert to fraction form
    13,608,903.80/20,413,355.70 = 11,761,326.20/x
  3. Step 3: Cross multiply
    13,608,903.80x = 20,413,355.70 × 11,761,326.20
  4. Step 4: Simplify right side
    13,608,903.80x = 240,088,135,224,329.31
  5. Step 5: Solve for x
    x = 240,088,135,224,329.31/13,608,903.80
  6. Step 6: Final answer
    x = 17,641,989.30

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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.