Home / 15,520.96-21,418.80-8,447.44

Finding the Fourth Proportional to 15,520.96, 21,418.80 and 8,447.44

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Solution

The fourth proportional to 15,520.96, 21,418.80 and 8,447.44 is: 11,657.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.96 : 21,418.80 = 8,447.44 : x
  2. Step 2: Convert to fraction form
    15,520.96/21,418.80 = 8,447.44/x
  3. Step 3: Cross multiply
    15,520.96x = 21,418.80 × 8,447.44
  4. Step 4: Simplify right side
    15,520.96x = 180,934,027.87
  5. Step 5: Solve for x
    x = 180,934,027.87/15,520.96
  6. Step 6: Final answer
    x = 11,657.40

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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.