Home / 20,954.28-31,442.10-13,939.23

Finding the Fourth Proportional to 20,954.28, 31,442.10 and 13,939.23

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Solution

The fourth proportional to 20,954.28, 31,442.10 and 13,939.23 is: 20,915.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.28 : 31,442.10 = 13,939.23 : x
  2. Step 2: Convert to fraction form
    20,954.28/31,442.10 = 13,939.23/x
  3. Step 3: Cross multiply
    20,954.28x = 31,442.10 × 13,939.23
  4. Step 4: Simplify right side
    20,954.28x = 438,278,663.58
  5. Step 5: Solve for x
    x = 438,278,663.58/20,954.28
  6. Step 6: Final answer
    x = 20,915.95

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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.