Home / 20,590.39-28,414.76-11,158.95

Finding the Fourth Proportional to 20,590.39, 28,414.76 and 11,158.95

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Solution

The fourth proportional to 20,590.39, 28,414.76 and 11,158.95 is: 15,399.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.39 : 28,414.76 = 11,158.95 : x
  2. Step 2: Convert to fraction form
    20,590.39/28,414.76 = 11,158.95/x
  3. Step 3: Cross multiply
    20,590.39x = 28,414.76 × 11,158.95
  4. Step 4: Simplify right side
    20,590.39x = 317,078,886.10
  5. Step 5: Solve for x
    x = 317,078,886.10/20,590.39
  6. Step 6: Final answer
    x = 15,399.36

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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.