Home / 31,269.12-43,122.20-19,926.78

Finding the Fourth Proportional to 31,269.12, 43,122.20 and 19,926.78

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Solution

The fourth proportional to 31,269.12, 43,122.20 and 19,926.78 is: 27,480.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,269.12 : 43,122.20 = 19,926.78 : x
  2. Step 2: Convert to fraction form
    31,269.12/43,122.20 = 19,926.78/x
  3. Step 3: Cross multiply
    31,269.12x = 43,122.20 × 19,926.78
  4. Step 4: Simplify right side
    31,269.12x = 859,286,592.52
  5. Step 5: Solve for x
    x = 859,286,592.52/31,269.12
  6. Step 6: Final answer
    x = 27,480.36

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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.