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Finding the Fourth Proportional to 8,706.84, 13,061.88 and 2,867.55

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Solution

The fourth proportional to 8,706.84, 13,061.88 and 2,867.55 is: 4,301.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.84 : 13,061.88 = 2,867.55 : x
  2. Step 2: Convert to fraction form
    8,706.84/13,061.88 = 2,867.55/x
  3. Step 3: Cross multiply
    8,706.84x = 13,061.88 × 2,867.55
  4. Step 4: Simplify right side
    8,706.84x = 37,455,593.99
  5. Step 5: Solve for x
    x = 37,455,593.99/8,706.84
  6. Step 6: Final answer
    x = 4,301.86

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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.