Home / 28,375.20-39,156.72-15,799.68

Finding the Fourth Proportional to 28,375.20, 39,156.72 and 15,799.68

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Solution

The fourth proportional to 28,375.20, 39,156.72 and 15,799.68 is: 21,802.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.20 : 39,156.72 = 15,799.68 : x
  2. Step 2: Convert to fraction form
    28,375.20/39,156.72 = 15,799.68/x
  3. Step 3: Cross multiply
    28,375.20x = 39,156.72 × 15,799.68
  4. Step 4: Simplify right side
    28,375.20x = 618,663,645.85
  5. Step 5: Solve for x
    x = 618,663,645.85/28,375.20
  6. Step 6: Final answer
    x = 21,802.97

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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.