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Finding the Fourth Proportional to 8,706.68, 12,011.20 and 5,167.88

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Solution

The fourth proportional to 8,706.68, 12,011.20 and 5,167.88 is: 7,129.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.68 : 12,011.20 = 5,167.88 : x
  2. Step 2: Convert to fraction form
    8,706.68/12,011.20 = 5,167.88/x
  3. Step 3: Cross multiply
    8,706.68x = 12,011.20 × 5,167.88
  4. Step 4: Simplify right side
    8,706.68x = 62,072,440.26
  5. Step 5: Solve for x
    x = 62,072,440.26/8,706.68
  6. Step 6: Final answer
    x = 7,129.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.