Home / 20,351.40-28,084.10-11,398.76

Finding the Fourth Proportional to 20,351.40, 28,084.10 and 11,398.76

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Solution

The fourth proportional to 20,351.40, 28,084.10 and 11,398.76 is: 15,729.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.40 : 28,084.10 = 11,398.76 : x
  2. Step 2: Convert to fraction form
    20,351.40/28,084.10 = 11,398.76/x
  3. Step 3: Cross multiply
    20,351.40x = 28,084.10 × 11,398.76
  4. Step 4: Simplify right side
    20,351.40x = 320,123,915.72
  5. Step 5: Solve for x
    x = 320,123,915.72/20,351.40
  6. Step 6: Final answer
    x = 15,729.82

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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.