Home / 28,872.96-39,843.56-18,123.61

Finding the Fourth Proportional to 28,872.96, 39,843.56 and 18,123.61

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Solution

The fourth proportional to 28,872.96, 39,843.56 and 18,123.61 is: 25,009.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,872.96 : 39,843.56 = 18,123.61 : x
  2. Step 2: Convert to fraction form
    28,872.96/39,843.56 = 18,123.61/x
  3. Step 3: Cross multiply
    28,872.96x = 39,843.56 × 18,123.61
  4. Step 4: Simplify right side
    28,872.96x = 722,109,162.86
  5. Step 5: Solve for x
    x = 722,109,162.86/28,872.96
  6. Step 6: Final answer
    x = 25,009.87

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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.