Home / 20,728.57-28,605.52-11,776.56

Finding the Fourth Proportional to 20,728.57, 28,605.52 and 11,776.56

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Solution

The fourth proportional to 20,728.57, 28,605.52 and 11,776.56 is: 16,251.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.57 : 28,605.52 = 11,776.56 : x
  2. Step 2: Convert to fraction form
    20,728.57/28,605.52 = 11,776.56/x
  3. Step 3: Cross multiply
    20,728.57x = 28,605.52 × 11,776.56
  4. Step 4: Simplify right side
    20,728.57x = 336,874,593.17
  5. Step 5: Solve for x
    x = 336,874,593.17/20,728.57
  6. Step 6: Final answer
    x = 16,251.71

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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.