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Finding the Fourth Proportional to 8,655.66, 12,981.87 and 5,388.93

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Solution

The fourth proportional to 8,655.66, 12,981.87 and 5,388.93 is: 8,082.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.66 : 12,981.87 = 5,388.93 : x
  2. Step 2: Convert to fraction form
    8,655.66/12,981.87 = 5,388.93/x
  3. Step 3: Cross multiply
    8,655.66x = 12,981.87 × 5,388.93
  4. Step 4: Simplify right side
    8,655.66x = 69,958,388.70
  5. Step 5: Solve for x
    x = 69,958,388.70/8,655.66
  6. Step 6: Final answer
    x = 8,082.39

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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.