Home / 20,952.78-31,439.85-13,937.73

Finding the Fourth Proportional to 20,952.78, 31,439.85 and 13,937.73

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Solution

The fourth proportional to 20,952.78, 31,439.85 and 13,937.73 is: 20,913.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.78 : 31,439.85 = 13,937.73 : x
  2. Step 2: Convert to fraction form
    20,952.78/31,439.85 = 13,937.73/x
  3. Step 3: Cross multiply
    20,952.78x = 31,439.85 × 13,937.73
  4. Step 4: Simplify right side
    20,952.78x = 438,200,140.54
  5. Step 5: Solve for x
    x = 438,200,140.54/20,952.78
  6. Step 6: Final answer
    x = 20,913.70

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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.