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Finding the Fourth Proportional to 12,659.85, 18,990.86 and 3,301.11

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Solution

The fourth proportional to 12,659.85, 18,990.86 and 3,301.11 is: 4,951.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.85 : 18,990.86 = 3,301.11 : x
  2. Step 2: Convert to fraction form
    12,659.85/18,990.86 = 3,301.11/x
  3. Step 3: Cross multiply
    12,659.85x = 18,990.86 × 3,301.11
  4. Step 4: Simplify right side
    12,659.85x = 62,690,901.35
  5. Step 5: Solve for x
    x = 62,690,901.35/12,659.85
  6. Step 6: Final answer
    x = 4,951.95

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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.