Home / 42,120.38-63,147.54-21,059.48

Finding the Fourth Proportional to 42,120.38, 63,147.54 and 21,059.48

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Solution

The fourth proportional to 42,120.38, 63,147.54 and 21,059.48 is: 31,572.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,120.38 : 63,147.54 = 21,059.48 : x
  2. Step 2: Convert to fraction form
    42,120.38/63,147.54 = 21,059.48/x
  3. Step 3: Cross multiply
    42,120.38x = 63,147.54 × 21,059.48
  4. Step 4: Simplify right side
    42,120.38x = 1,329,854,355.68
  5. Step 5: Solve for x
    x = 1,329,854,355.68/42,120.38
  6. Step 6: Final answer
    x = 31,572.71

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1.5x scale

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.