Home / 20,854.92-31,329.42-12,111.24

Finding the Fourth Proportional to 20,854.92, 31,329.42 and 12,111.24

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Solution

The fourth proportional to 20,854.92, 31,329.42 and 12,111.24 is: 18,194.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.92 : 31,329.42 = 12,111.24 : x
  2. Step 2: Convert to fraction form
    20,854.92/31,329.42 = 12,111.24/x
  3. Step 3: Cross multiply
    20,854.92x = 31,329.42 × 12,111.24
  4. Step 4: Simplify right side
    20,854.92x = 379,438,124.68
  5. Step 5: Solve for x
    x = 379,438,124.68/20,854.92
  6. Step 6: Final answer
    x = 18,194.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.