Home / 20,738.88-28,618.56-15,456.96

Finding the Fourth Proportional to 20,738.88, 28,618.56 and 15,456.96

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Solution

The fourth proportional to 20,738.88, 28,618.56 and 15,456.96 is: 21,329.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.88 : 28,618.56 = 15,456.96 : x
  2. Step 2: Convert to fraction form
    20,738.88/28,618.56 = 15,456.96/x
  3. Step 3: Cross multiply
    20,738.88x = 28,618.56 × 15,456.96
  4. Step 4: Simplify right side
    20,738.88x = 442,355,937.18
  5. Step 5: Solve for x
    x = 442,355,937.18/20,738.88
  6. Step 6: Final answer
    x = 21,329.79

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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.