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Finding the Fourth Proportional to 20,999.30, 31,500.08 and 8,517.46

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Solution

The fourth proportional to 20,999.30, 31,500.08 and 8,517.46 is: 12,776.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.30 : 31,500.08 = 8,517.46 : x
  2. Step 2: Convert to fraction form
    20,999.30/31,500.08 = 8,517.46/x
  3. Step 3: Cross multiply
    20,999.30x = 31,500.08 × 8,517.46
  4. Step 4: Simplify right side
    20,999.30x = 268,300,671.40
  5. Step 5: Solve for x
    x = 268,300,671.40/20,999.30
  6. Step 6: Final answer
    x = 12,776.65

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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.