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Finding the Fourth Proportional to 39,159.46, 54,040.11 and 21,254.47

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Solution

The fourth proportional to 39,159.46, 54,040.11 and 21,254.47 is: 29,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,159.46 : 54,040.11 = 21,254.47 : x
  2. Step 2: Convert to fraction form
    39,159.46/54,040.11 = 21,254.47/x
  3. Step 3: Cross multiply
    39,159.46x = 54,040.11 × 21,254.47
  4. Step 4: Simplify right side
    39,159.46x = 1,148,593,896.79
  5. Step 5: Solve for x
    x = 1,148,593,896.79/39,159.46
  6. Step 6: Final answer
    x = 29,331.20

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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.