Home / 20,143.60-30,211.62-8,456.92

Finding the Fourth Proportional to 20,143.60, 30,211.62 and 8,456.92

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Solution

The fourth proportional to 20,143.60, 30,211.62 and 8,456.92 is: 12,683.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.60 : 30,211.62 = 8,456.92 : x
  2. Step 2: Convert to fraction form
    20,143.60/30,211.62 = 8,456.92/x
  3. Step 3: Cross multiply
    20,143.60x = 30,211.62 × 8,456.92
  4. Step 4: Simplify right side
    20,143.60x = 255,497,253.41
  5. Step 5: Solve for x
    x = 255,497,253.41/20,143.60
  6. Step 6: Final answer
    x = 12,683.79

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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.