Home / 20,442.38-28,209.08-11,491.23

Finding the Fourth Proportional to 20,442.38, 28,209.08 and 11,491.23

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Solution

The fourth proportional to 20,442.38, 28,209.08 and 11,491.23 is: 15,857.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442.38 : 28,209.08 = 11,491.23 : x
  2. Step 2: Convert to fraction form
    20,442.38/28,209.08 = 11,491.23/x
  3. Step 3: Cross multiply
    20,442.38x = 28,209.08 × 11,491.23
  4. Step 4: Simplify right side
    20,442.38x = 324,156,968.91
  5. Step 5: Solve for x
    x = 324,156,968.91/20,442.38
  6. Step 6: Final answer
    x = 15,857.11

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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.