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Finding the Fourth Proportional to 18,438.68, 27,658.19 and 5,958.71

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Solution

The fourth proportional to 18,438.68, 27,658.19 and 5,958.71 is: 8,938.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.68 : 27,658.19 = 5,958.71 : x
  2. Step 2: Convert to fraction form
    18,438.68/27,658.19 = 5,958.71/x
  3. Step 3: Cross multiply
    18,438.68x = 27,658.19 × 5,958.71
  4. Step 4: Simplify right side
    18,438.68x = 164,806,965.25
  5. Step 5: Solve for x
    x = 164,806,965.25/18,438.68
  6. Step 6: Final answer
    x = 8,938.11

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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.