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Finding the Fourth Proportional to 8,708.84, 13,068.74 and 3,711.21

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Solution

The fourth proportional to 8,708.84, 13,068.74 and 3,711.21 is: 5,569.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.84 : 13,068.74 = 3,711.21 : x
  2. Step 2: Convert to fraction form
    8,708.84/13,068.74 = 3,711.21/x
  3. Step 3: Cross multiply
    8,708.84x = 13,068.74 × 3,711.21
  4. Step 4: Simplify right side
    8,708.84x = 48,500,847.85
  5. Step 5: Solve for x
    x = 48,500,847.85/8,708.84
  6. Step 6: Final answer
    x = 5,569.15

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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.