Home / 22,121.97-30,528.36-13,169.78

Finding the Fourth Proportional to 22,121.97, 30,528.36 and 13,169.78

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Solution

The fourth proportional to 22,121.97, 30,528.36 and 13,169.78 is: 18,174.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,121.97 : 30,528.36 = 13,169.78 : x
  2. Step 2: Convert to fraction form
    22,121.97/30,528.36 = 13,169.78/x
  3. Step 3: Cross multiply
    22,121.97x = 30,528.36 × 13,169.78
  4. Step 4: Simplify right side
    22,121.97x = 402,051,861.28
  5. Step 5: Solve for x
    x = 402,051,861.28/22,121.97
  6. Step 6: Final answer
    x = 18,174.32

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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.