Home / 20,679.50-28,537.92-11,248.10

Finding the Fourth Proportional to 20,679.50, 28,537.92 and 11,248.10

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Solution

The fourth proportional to 20,679.50, 28,537.92 and 11,248.10 is: 15,522.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.50 : 28,537.92 = 11,248.10 : x
  2. Step 2: Convert to fraction form
    20,679.50/28,537.92 = 11,248.10/x
  3. Step 3: Cross multiply
    20,679.50x = 28,537.92 × 11,248.10
  4. Step 4: Simplify right side
    20,679.50x = 320,997,377.95
  5. Step 5: Solve for x
    x = 320,997,377.95/20,679.50
  6. Step 6: Final answer
    x = 15,522.49

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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.