Home / 20,487.12-30,694.15-11,121.18

Finding the Fourth Proportional to 20,487.12, 30,694.15 and 11,121.18

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Solution

The fourth proportional to 20,487.12, 30,694.15 and 11,121.18 is: 16,661.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.12 : 30,694.15 = 11,121.18 : x
  2. Step 2: Convert to fraction form
    20,487.12/30,694.15 = 11,121.18/x
  3. Step 3: Cross multiply
    20,487.12x = 30,694.15 × 11,121.18
  4. Step 4: Simplify right side
    20,487.12x = 341,355,167.10
  5. Step 5: Solve for x
    x = 341,355,167.10/20,487.12
  6. Step 6: Final answer
    x = 16,661.94

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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.