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Finding the Fourth Proportional to 13,230.87, 18,254.86 and 8,517.88

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Solution

The fourth proportional to 13,230.87, 18,254.86 and 8,517.88 is: 11,752.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,230.87 : 18,254.86 = 8,517.88 : x
  2. Step 2: Convert to fraction form
    13,230.87/18,254.86 = 8,517.88/x
  3. Step 3: Cross multiply
    13,230.87x = 18,254.86 × 8,517.88
  4. Step 4: Simplify right side
    13,230.87x = 155,492,706.90
  5. Step 5: Solve for x
    x = 155,492,706.90/13,230.87
  6. Step 6: Final answer
    x = 11,752.27

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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.