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Finding the Fourth Proportional to 8,516.76, 12,780.08 and 3,586

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Solution

The fourth proportional to 8,516.76, 12,780.08 and 3,586 is: 5,381.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,516.76 : 12,780.08 = 3,586 : x
  2. Step 2: Convert to fraction form
    8,516.76/12,780.08 = 3,586/x
  3. Step 3: Cross multiply
    8,516.76x = 12,780.08 × 3,586
  4. Step 4: Simplify right side
    8,516.76x = 45,829,366.88
  5. Step 5: Solve for x
    x = 45,829,366.88/8,516.76
  6. Step 6: Final answer
    x = 5,381.08

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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.