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Finding the Fourth Proportional to 8,675.80, 13,016.90 and 8,355.80

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Solution

The fourth proportional to 8,675.80, 13,016.90 and 8,355.80 is: 12,536.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,675.80 : 13,016.90 = 8,355.80 : x
  2. Step 2: Convert to fraction form
    8,675.80/13,016.90 = 8,355.80/x
  3. Step 3: Cross multiply
    8,675.80x = 13,016.90 × 8,355.80
  4. Step 4: Simplify right side
    8,675.80x = 108,766,613.02
  5. Step 5: Solve for x
    x = 108,766,613.02/8,675.80
  6. Step 6: Final answer
    x = 12,536.78

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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.