Home / 20,747.85-28,632.06-11,316.57

Finding the Fourth Proportional to 20,747.85, 28,632.06 and 11,316.57

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Solution

The fourth proportional to 20,747.85, 28,632.06 and 11,316.57 is: 15,616.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.85 : 28,632.06 = 11,316.57 : x
  2. Step 2: Convert to fraction form
    20,747.85/28,632.06 = 11,316.57/x
  3. Step 3: Cross multiply
    20,747.85x = 28,632.06 × 11,316.57
  4. Step 4: Simplify right side
    20,747.85x = 324,016,711.23
  5. Step 5: Solve for x
    x = 324,016,711.23/20,747.85
  6. Step 6: Final answer
    x = 15,616.88

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Double scale
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Similar ratio
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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.