Home / 18,221.85-25,108.67-13,972.70

Finding the Fourth Proportional to 18,221.85, 25,108.67 and 13,972.70

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Solution

The fourth proportional to 18,221.85, 25,108.67 and 13,972.70 is: 19,253.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.85 : 25,108.67 = 13,972.70 : x
  2. Step 2: Convert to fraction form
    18,221.85/25,108.67 = 13,972.70/x
  3. Step 3: Cross multiply
    18,221.85x = 25,108.67 × 13,972.70
  4. Step 4: Simplify right side
    18,221.85x = 350,836,011.01
  5. Step 5: Solve for x
    x = 350,836,011.01/18,221.85
  6. Step 6: Final answer
    x = 19,253.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.