Home / 15,520.29-21,418.44-8,447.16

Finding the Fourth Proportional to 15,520.29, 21,418.44 and 8,447.16

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Solution

The fourth proportional to 15,520.29, 21,418.44 and 8,447.16 is: 11,657.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.29 : 21,418.44 = 8,447.16 : x
  2. Step 2: Convert to fraction form
    15,520.29/21,418.44 = 8,447.16/x
  3. Step 3: Cross multiply
    15,520.29x = 21,418.44 × 8,447.16
  4. Step 4: Simplify right side
    15,520.29x = 180,924,989.63
  5. Step 5: Solve for x
    x = 180,924,989.63/15,520.29
  6. Step 6: Final answer
    x = 11,657.32

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Half scale
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Double scale
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Similar ratio
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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.