Home / 20,318.92-28,039.98-11,366.38

Finding the Fourth Proportional to 20,318.92, 28,039.98 and 11,366.38

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Solution

The fourth proportional to 20,318.92, 28,039.98 and 11,366.38 is: 15,685.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.92 : 28,039.98 = 11,366.38 : x
  2. Step 2: Convert to fraction form
    20,318.92/28,039.98 = 11,366.38/x
  3. Step 3: Cross multiply
    20,318.92x = 28,039.98 × 11,366.38
  4. Step 4: Simplify right side
    20,318.92x = 318,713,067.87
  5. Step 5: Solve for x
    x = 318,713,067.87/20,318.92
  6. Step 6: Final answer
    x = 15,685.53

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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.