Home / 39,139.80-54,013.14-21,234.84

Finding the Fourth Proportional to 39,139.80, 54,013.14 and 21,234.84

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Solution

The fourth proportional to 39,139.80, 54,013.14 and 21,234.84 is: 29,304.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,139.80 : 54,013.14 = 21,234.84 : x
  2. Step 2: Convert to fraction form
    39,139.80/54,013.14 = 21,234.84/x
  3. Step 3: Cross multiply
    39,139.80x = 54,013.14 × 21,234.84
  4. Step 4: Simplify right side
    39,139.80x = 1,146,960,385.80
  5. Step 5: Solve for x
    x = 1,146,960,385.80/39,139.80
  6. Step 6: Final answer
    x = 29,304.20

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1.5x scale

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.