Home / 28,425.97-39,231.18-16,330.78

Finding the Fourth Proportional to 28,425.97, 39,231.18 and 16,330.78

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Solution

The fourth proportional to 28,425.97, 39,231.18 and 16,330.78 is: 22,538.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.97 : 39,231.18 = 16,330.78 : x
  2. Step 2: Convert to fraction form
    28,425.97/39,231.18 = 16,330.78/x
  3. Step 3: Cross multiply
    28,425.97x = 39,231.18 × 16,330.78
  4. Step 4: Simplify right side
    28,425.97x = 640,675,769.72
  5. Step 5: Solve for x
    x = 640,675,769.72/28,425.97
  6. Step 6: Final answer
    x = 22,538.40

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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.