Home / 20,998.60-31,473.60-8,512.45

Finding the Fourth Proportional to 20,998.60, 31,473.60 and 8,512.45

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Solution

The fourth proportional to 20,998.60, 31,473.60 and 8,512.45 is: 12,758.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.60 : 31,473.60 = 8,512.45 : x
  2. Step 2: Convert to fraction form
    20,998.60/31,473.60 = 8,512.45/x
  3. Step 3: Cross multiply
    20,998.60x = 31,473.60 × 8,512.45
  4. Step 4: Simplify right side
    20,998.60x = 267,917,446.32
  5. Step 5: Solve for x
    x = 267,917,446.32/20,998.60
  6. Step 6: Final answer
    x = 12,758.82

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1.5x scale

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.