Home / 20,108.70-30,163.05-13,887.90

Finding the Fourth Proportional to 20,108.70, 30,163.05 and 13,887.90

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Solution

The fourth proportional to 20,108.70, 30,163.05 and 13,887.90 is: 20,831.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.70 : 30,163.05 = 13,887.90 : x
  2. Step 2: Convert to fraction form
    20,108.70/30,163.05 = 13,887.90/x
  3. Step 3: Cross multiply
    20,108.70x = 30,163.05 × 13,887.90
  4. Step 4: Simplify right side
    20,108.70x = 418,901,422.10
  5. Step 5: Solve for x
    x = 418,901,422.10/20,108.70
  6. Step 6: Final answer
    x = 20,831.85

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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.