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Finding the Fourth Proportional to 8,873.68, 12,251.84 and 5,518

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Solution

The fourth proportional to 8,873.68, 12,251.84 and 5,518 is: 7,618.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,873.68 : 12,251.84 = 5,518 : x
  2. Step 2: Convert to fraction form
    8,873.68/12,251.84 = 5,518/x
  3. Step 3: Cross multiply
    8,873.68x = 12,251.84 × 5,518
  4. Step 4: Simplify right side
    8,873.68x = 67,605,653.12
  5. Step 5: Solve for x
    x = 67,605,653.12/8,873.68
  6. Step 6: Final answer
    x = 7,618.67

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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.