Home / 15,111.28-20,854.12-8,397.57

Finding the Fourth Proportional to 15,111.28, 20,854.12 and 8,397.57

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Solution

The fourth proportional to 15,111.28, 20,854.12 and 8,397.57 is: 11,588.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.28 : 20,854.12 = 8,397.57 : x
  2. Step 2: Convert to fraction form
    15,111.28/20,854.12 = 8,397.57/x
  3. Step 3: Cross multiply
    15,111.28x = 20,854.12 × 8,397.57
  4. Step 4: Simplify right side
    15,111.28x = 175,123,890.50
  5. Step 5: Solve for x
    x = 175,123,890.50/15,111.28
  6. Step 6: Final answer
    x = 11,588.95

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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.