Home / 20,159.78-27,819.90-11,545.68

Finding the Fourth Proportional to 20,159.78, 27,819.90 and 11,545.68

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Solution

The fourth proportional to 20,159.78, 27,819.90 and 11,545.68 is: 15,932.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,159.78 : 27,819.90 = 11,545.68 : x
  2. Step 2: Convert to fraction form
    20,159.78/27,819.90 = 11,545.68/x
  3. Step 3: Cross multiply
    20,159.78x = 27,819.90 × 11,545.68
  4. Step 4: Simplify right side
    20,159.78x = 321,199,663.03
  5. Step 5: Solve for x
    x = 321,199,663.03/20,159.78
  6. Step 6: Final answer
    x = 15,932.70

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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.