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Finding the Fourth Proportional to 13,231.87, 18,256.24 and 8,518.88

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Solution

The fourth proportional to 13,231.87, 18,256.24 and 8,518.88 is: 11,753.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,231.87 : 18,256.24 = 8,518.88 : x
  2. Step 2: Convert to fraction form
    13,231.87/18,256.24 = 8,518.88/x
  3. Step 3: Cross multiply
    13,231.87x = 18,256.24 × 8,518.88
  4. Step 4: Simplify right side
    13,231.87x = 155,522,717.81
  5. Step 5: Solve for x
    x = 155,522,717.81/13,231.87
  6. Step 6: Final answer
    x = 11,753.65

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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.