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Finding the Fourth Proportional to 18,253.59, 27,380.08 and 5,105.76

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Solution

The fourth proportional to 18,253.59, 27,380.08 and 5,105.76 is: 7,658.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,253.59 : 27,380.08 = 5,105.76 : x
  2. Step 2: Convert to fraction form
    18,253.59/27,380.08 = 5,105.76/x
  3. Step 3: Cross multiply
    18,253.59x = 27,380.08 × 5,105.76
  4. Step 4: Simplify right side
    18,253.59x = 139,796,117.26
  5. Step 5: Solve for x
    x = 139,796,117.26/18,253.59
  6. Step 6: Final answer
    x = 7,658.55

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1.5x scale

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.