Home / 20,108.13-30,180.80-10,254.75

Finding the Fourth Proportional to 20,108.13, 30,180.80 and 10,254.75

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Solution

The fourth proportional to 20,108.13, 30,180.80 and 10,254.75 is: 15,391.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.13 : 30,180.80 = 10,254.75 : x
  2. Step 2: Convert to fraction form
    20,108.13/30,180.80 = 10,254.75/x
  3. Step 3: Cross multiply
    20,108.13x = 30,180.80 × 10,254.75
  4. Step 4: Simplify right side
    20,108.13x = 309,496,558.80
  5. Step 5: Solve for x
    x = 309,496,558.80/20,108.13
  6. Step 6: Final answer
    x = 15,391.61

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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.