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Finding the Fourth Proportional to 12,347.70, 18,521.55 and 8,589.30

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Solution

The fourth proportional to 12,347.70, 18,521.55 and 8,589.30 is: 12,883.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,347.70 : 18,521.55 = 8,589.30 : x
  2. Step 2: Convert to fraction form
    12,347.70/18,521.55 = 8,589.30/x
  3. Step 3: Cross multiply
    12,347.70x = 18,521.55 × 8,589.30
  4. Step 4: Simplify right side
    12,347.70x = 159,087,149.42
  5. Step 5: Solve for x
    x = 159,087,149.42/12,347.70
  6. Step 6: Final answer
    x = 12,883.95

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Similar ratio
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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.