Home / 28,180.31-38,871.23-18,121.86

Finding the Fourth Proportional to 28,180.31, 38,871.23 and 18,121.86

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Solution

The fourth proportional to 28,180.31, 38,871.23 and 18,121.86 is: 24,996.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.31 : 38,871.23 = 18,121.86 : x
  2. Step 2: Convert to fraction form
    28,180.31/38,871.23 = 18,121.86/x
  3. Step 3: Cross multiply
    28,180.31x = 38,871.23 × 18,121.86
  4. Step 4: Simplify right side
    28,180.31x = 704,418,897.48
  5. Step 5: Solve for x
    x = 704,418,897.48/28,180.31
  6. Step 6: Final answer
    x = 24,996.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.