Home / 18,121.86-27,139.05-10,306.98

Finding the Fourth Proportional to 18,121.86, 27,139.05 and 10,306.98

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Solution

The fourth proportional to 18,121.86, 27,139.05 and 10,306.98 is: 15,435.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.86 : 27,139.05 = 10,306.98 : x
  2. Step 2: Convert to fraction form
    18,121.86/27,139.05 = 10,306.98/x
  3. Step 3: Cross multiply
    18,121.86x = 27,139.05 × 10,306.98
  4. Step 4: Simplify right side
    18,121.86x = 279,721,645.57
  5. Step 5: Solve for x
    x = 279,721,645.57/18,121.86
  6. Step 6: Final answer
    x = 15,435.59

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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.