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Finding the Fourth Proportional to 40,986.52, 61,429.02 and 19,909.32

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Solution

The fourth proportional to 40,986.52, 61,429.02 and 19,909.32 is: 29,839.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,986.52 : 61,429.02 = 19,909.32 : x
  2. Step 2: Convert to fraction form
    40,986.52/61,429.02 = 19,909.32/x
  3. Step 3: Cross multiply
    40,986.52x = 61,429.02 × 19,909.32
  4. Step 4: Simplify right side
    40,986.52x = 1,223,010,016.47
  5. Step 5: Solve for x
    x = 1,223,010,016.47/40,986.52
  6. Step 6: Final answer
    x = 29,839.32

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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.