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Finding the Fourth Proportional to 20,675.60, 31,003.80 and 8,982.80

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Solution

The fourth proportional to 20,675.60, 31,003.80 and 8,982.80 is: 13,470.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.60 : 31,003.80 = 8,982.80 : x
  2. Step 2: Convert to fraction form
    20,675.60/31,003.80 = 8,982.80/x
  3. Step 3: Cross multiply
    20,675.60x = 31,003.80 × 8,982.80
  4. Step 4: Simplify right side
    20,675.60x = 278,500,934.64
  5. Step 5: Solve for x
    x = 278,500,934.64/20,675.60
  6. Step 6: Final answer
    x = 13,470.03

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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.