Home / 18,747.11-28,119.92-10,421.87

Finding the Fourth Proportional to 18,747.11, 28,119.92 and 10,421.87

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Solution

The fourth proportional to 18,747.11, 28,119.92 and 10,421.87 is: 15,632.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.11 : 28,119.92 = 10,421.87 : x
  2. Step 2: Convert to fraction form
    18,747.11/28,119.92 = 10,421.87/x
  3. Step 3: Cross multiply
    18,747.11x = 28,119.92 × 10,421.87
  4. Step 4: Simplify right side
    18,747.11x = 293,062,010.05
  5. Step 5: Solve for x
    x = 293,062,010.05/18,747.11
  6. Step 6: Final answer
    x = 15,632.38

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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.