Home / 28,171.72-38,877.57-15,425.44

Finding the Fourth Proportional to 28,171.72, 38,877.57 and 15,425.44

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Solution

The fourth proportional to 28,171.72, 38,877.57 and 15,425.44 is: 21,287.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,171.72 : 38,877.57 = 15,425.44 : x
  2. Step 2: Convert to fraction form
    28,171.72/38,877.57 = 15,425.44/x
  3. Step 3: Cross multiply
    28,171.72x = 38,877.57 × 15,425.44
  4. Step 4: Simplify right side
    28,171.72x = 599,703,623.38
  5. Step 5: Solve for x
    x = 599,703,623.38/28,171.72
  6. Step 6: Final answer
    x = 21,287.43

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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.