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Finding the Fourth Proportional to 8,701.68, 12,009.84 and 5,166

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Solution

The fourth proportional to 8,701.68, 12,009.84 and 5,166 is: 7,129.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,701.68 : 12,009.84 = 5,166 : x
  2. Step 2: Convert to fraction form
    8,701.68/12,009.84 = 5,166/x
  3. Step 3: Cross multiply
    8,701.68x = 12,009.84 × 5,166
  4. Step 4: Simplify right side
    8,701.68x = 62,042,833.44
  5. Step 5: Solve for x
    x = 62,042,833.44/8,701.68
  6. Step 6: Final answer
    x = 7,129.98

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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.