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Finding the Fourth Proportional to 39,291.28, 54,223.02 and 21,387.49

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Solution

The fourth proportional to 39,291.28, 54,223.02 and 21,387.49 is: 29,515.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,291.28 : 54,223.02 = 21,387.49 : x
  2. Step 2: Convert to fraction form
    39,291.28/54,223.02 = 21,387.49/x
  3. Step 3: Cross multiply
    39,291.28x = 54,223.02 × 21,387.49
  4. Step 4: Simplify right side
    39,291.28x = 1,159,694,467.47
  5. Step 5: Solve for x
    x = 1,159,694,467.47/39,291.28
  6. Step 6: Final answer
    x = 29,515.32

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