Home / 15,520.50-21,418.38-8,446.98

Finding the Fourth Proportional to 15,520.50, 21,418.38 and 8,446.98

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Solution

The fourth proportional to 15,520.50, 21,418.38 and 8,446.98 is: 11,656.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.50 : 21,418.38 = 8,446.98 : x
  2. Step 2: Convert to fraction form
    15,520.50/21,418.38 = 8,446.98/x
  3. Step 3: Cross multiply
    15,520.50x = 21,418.38 × 8,446.98
  4. Step 4: Simplify right side
    15,520.50x = 180,920,627.49
  5. Step 5: Solve for x
    x = 180,920,627.49/15,520.50
  6. Step 6: Final answer
    x = 11,656.88

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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.