Home / 39,159.38-54,040-21,254.39

Finding the Fourth Proportional to 39,159.38, 54,040 and 21,254.39

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Solution

The fourth proportional to 39,159.38, 54,040 and 21,254.39 is: 29,331.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,159.38 : 54,040 = 21,254.39 : x
  2. Step 2: Convert to fraction form
    39,159.38/54,040 = 21,254.39/x
  3. Step 3: Cross multiply
    39,159.38x = 54,040 × 21,254.39
  4. Step 4: Simplify right side
    39,159.38x = 1,148,587,235.60
  5. Step 5: Solve for x
    x = 1,148,587,235.60/39,159.38
  6. Step 6: Final answer
    x = 29,331.09

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Why These Related Problems?

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