Home / 21,027.57-31,540.66-8,543.90

Finding the Fourth Proportional to 21,027.57, 31,540.66 and 8,543.90

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Solution

The fourth proportional to 21,027.57, 31,540.66 and 8,543.90 is: 12,815.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.57 : 31,540.66 = 8,543.90 : x
  2. Step 2: Convert to fraction form
    21,027.57/31,540.66 = 8,543.90/x
  3. Step 3: Cross multiply
    21,027.57x = 31,540.66 × 8,543.90
  4. Step 4: Simplify right side
    21,027.57x = 269,480,244.97
  5. Step 5: Solve for x
    x = 269,480,244.97/21,027.57
  6. Step 6: Final answer
    x = 12,815.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.