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Finding the Fourth Proportional to 18,402.43, 27,609.95 and 7,868.11

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Solution

The fourth proportional to 18,402.43, 27,609.95 and 7,868.11 is: 11,804.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,402.43 : 27,609.95 = 7,868.11 : x
  2. Step 2: Convert to fraction form
    18,402.43/27,609.95 = 7,868.11/x
  3. Step 3: Cross multiply
    18,402.43x = 27,609.95 × 7,868.11
  4. Step 4: Simplify right side
    18,402.43x = 217,238,123.69
  5. Step 5: Solve for x
    x = 217,238,123.69/18,402.43
  6. Step 6: Final answer
    x = 11,804.86

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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.