Home / 20,121.30-30,169.95-12,335.70

Finding the Fourth Proportional to 20,121.30, 30,169.95 and 12,335.70

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Solution

The fourth proportional to 20,121.30, 30,169.95 and 12,335.70 is: 18,496.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.30 : 30,169.95 = 12,335.70 : x
  2. Step 2: Convert to fraction form
    20,121.30/30,169.95 = 12,335.70/x
  3. Step 3: Cross multiply
    20,121.30x = 30,169.95 × 12,335.70
  4. Step 4: Simplify right side
    20,121.30x = 372,167,452.22
  5. Step 5: Solve for x
    x = 372,167,452.22/20,121.30
  6. Step 6: Final answer
    x = 18,496.19

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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.