Home / 20,854.28-28,778.82-11,294.12

Finding the Fourth Proportional to 20,854.28, 28,778.82 and 11,294.12

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Solution

The fourth proportional to 20,854.28, 28,778.82 and 11,294.12 is: 15,585.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.28 : 28,778.82 = 11,294.12 : x
  2. Step 2: Convert to fraction form
    20,854.28/28,778.82 = 11,294.12/x
  3. Step 3: Cross multiply
    20,854.28x = 28,778.82 × 11,294.12
  4. Step 4: Simplify right side
    20,854.28x = 325,031,446.54
  5. Step 5: Solve for x
    x = 325,031,446.54/20,854.28
  6. Step 6: Final answer
    x = 15,585.84

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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.