Home / 22,812.45-31,482.07-13,121.88

Finding the Fourth Proportional to 22,812.45, 31,482.07 and 13,121.88

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Solution

The fourth proportional to 22,812.45, 31,482.07 and 13,121.88 is: 18,108.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,812.45 : 31,482.07 = 13,121.88 : x
  2. Step 2: Convert to fraction form
    22,812.45/31,482.07 = 13,121.88/x
  3. Step 3: Cross multiply
    22,812.45x = 31,482.07 × 13,121.88
  4. Step 4: Simplify right side
    22,812.45x = 413,103,944.69
  5. Step 5: Solve for x
    x = 413,103,944.69/22,812.45
  6. Step 6: Final answer
    x = 18,108.71

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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.