Home / 20,543.48-30,821.40-8,691.14

Finding the Fourth Proportional to 20,543.48, 30,821.40 and 8,691.14

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Solution

The fourth proportional to 20,543.48, 30,821.40 and 8,691.14 is: 13,039.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.48 : 30,821.40 = 8,691.14 : x
  2. Step 2: Convert to fraction form
    20,543.48/30,821.40 = 8,691.14/x
  3. Step 3: Cross multiply
    20,543.48x = 30,821.40 × 8,691.14
  4. Step 4: Simplify right side
    20,543.48x = 267,873,102.40
  5. Step 5: Solve for x
    x = 267,873,102.40/20,543.48
  6. Step 6: Final answer
    x = 13,039.32

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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.