Home / 20,729.40-31,098.15-8,247.30

Finding the Fourth Proportional to 20,729.40, 31,098.15 and 8,247.30

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Solution

The fourth proportional to 20,729.40, 31,098.15 and 8,247.30 is: 12,372.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.40 : 31,098.15 = 8,247.30 : x
  2. Step 2: Convert to fraction form
    20,729.40/31,098.15 = 8,247.30/x
  3. Step 3: Cross multiply
    20,729.40x = 31,098.15 × 8,247.30
  4. Step 4: Simplify right side
    20,729.40x = 256,475,772.50
  5. Step 5: Solve for x
    x = 256,475,772.50/20,729.40
  6. Step 6: Final answer
    x = 12,372.56

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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.