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Finding the Fourth Proportional to 8,650.80, 12,990.88 and 8,206.92

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Solution

The fourth proportional to 8,650.80, 12,990.88 and 8,206.92 is: 12,324.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,650.80 : 12,990.88 = 8,206.92 : x
  2. Step 2: Convert to fraction form
    8,650.80/12,990.88 = 8,206.92/x
  3. Step 3: Cross multiply
    8,650.80x = 12,990.88 × 8,206.92
  4. Step 4: Simplify right side
    8,650.80x = 106,615,123.15
  5. Step 5: Solve for x
    x = 106,615,123.15/8,650.80
  6. Step 6: Final answer
    x = 12,324.31

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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.