Home / 20,105.72-27,747.46-11,154.95

Finding the Fourth Proportional to 20,105.72, 27,747.46 and 11,154.95

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Solution

The fourth proportional to 20,105.72, 27,747.46 and 11,154.95 is: 15,394.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.72 : 27,747.46 = 11,154.95 : x
  2. Step 2: Convert to fraction form
    20,105.72/27,747.46 = 11,154.95/x
  3. Step 3: Cross multiply
    20,105.72x = 27,747.46 × 11,154.95
  4. Step 4: Simplify right side
    20,105.72x = 309,521,508.19
  5. Step 5: Solve for x
    x = 309,521,508.19/20,105.72
  6. Step 6: Final answer
    x = 15,394.70

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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.