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Finding the Fourth Proportional to 8,986.71, 12,401.68 and 5,008.61

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Solution

The fourth proportional to 8,986.71, 12,401.68 and 5,008.61 is: 6,911.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.71 : 12,401.68 = 5,008.61 : x
  2. Step 2: Convert to fraction form
    8,986.71/12,401.68 = 5,008.61/x
  3. Step 3: Cross multiply
    8,986.71x = 12,401.68 × 5,008.61
  4. Step 4: Simplify right side
    8,986.71x = 62,115,178.46
  5. Step 5: Solve for x
    x = 62,115,178.46/8,986.71
  6. Step 6: Final answer
    x = 6,911.89

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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.