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Finding the Fourth Proportional to 12,459.35, 18,689.03 and 8,551.91

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Solution

The fourth proportional to 12,459.35, 18,689.03 and 8,551.91 is: 12,827.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,459.35 : 18,689.03 = 8,551.91 : x
  2. Step 2: Convert to fraction form
    12,459.35/18,689.03 = 8,551.91/x
  3. Step 3: Cross multiply
    12,459.35x = 18,689.03 × 8,551.91
  4. Step 4: Simplify right side
    12,459.35x = 159,826,859.79
  5. Step 5: Solve for x
    x = 159,826,859.79/12,459.35
  6. Step 6: Final answer
    x = 12,827.87

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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.