Home / 15,229.92-21,016.26-8,515.20

Finding the Fourth Proportional to 15,229.92, 21,016.26 and 8,515.20

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Solution

The fourth proportional to 15,229.92, 21,016.26 and 8,515.20 is: 11,750.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,229.92 : 21,016.26 = 8,515.20 : x
  2. Step 2: Convert to fraction form
    15,229.92/21,016.26 = 8,515.20/x
  3. Step 3: Cross multiply
    15,229.92x = 21,016.26 × 8,515.20
  4. Step 4: Simplify right side
    15,229.92x = 178,957,657.15
  5. Step 5: Solve for x
    x = 178,957,657.15/15,229.92
  6. Step 6: Final answer
    x = 11,750.40

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Double scale
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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.