Home / 15,520.29-21,417.28-8,446.69

Finding the Fourth Proportional to 15,520.29, 21,417.28 and 8,446.69

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Solution

The fourth proportional to 15,520.29, 21,417.28 and 8,446.69 is: 11,656.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.29 : 21,417.28 = 8,446.69 : x
  2. Step 2: Convert to fraction form
    15,520.29/21,417.28 = 8,446.69/x
  3. Step 3: Cross multiply
    15,520.29x = 21,417.28 × 8,446.69
  4. Step 4: Simplify right side
    15,520.29x = 180,905,124.80
  5. Step 5: Solve for x
    x = 180,905,124.80/15,520.29
  6. Step 6: Final answer
    x = 11,656.04

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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.