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Finding the Fourth Proportional to 39,990.64, 59,909.64 and 22,407.28

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Solution

The fourth proportional to 39,990.64, 59,909.64 and 22,407.28 is: 33,568.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,990.64 : 59,909.64 = 22,407.28 : x
  2. Step 2: Convert to fraction form
    39,990.64/59,909.64 = 22,407.28/x
  3. Step 3: Cross multiply
    39,990.64x = 59,909.64 × 22,407.28
  4. Step 4: Simplify right side
    39,990.64x = 1,342,412,078.18
  5. Step 5: Solve for x
    x = 1,342,412,078.18/39,990.64
  6. Step 6: Final answer
    x = 33,568.16

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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.