Home / 28,175.18-38,879.60-15,425.51

Finding the Fourth Proportional to 28,175.18, 38,879.60 and 15,425.51

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Solution

The fourth proportional to 28,175.18, 38,879.60 and 15,425.51 is: 21,286.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,175.18 : 38,879.60 = 15,425.51 : x
  2. Step 2: Convert to fraction form
    28,175.18/38,879.60 = 15,425.51/x
  3. Step 3: Cross multiply
    28,175.18x = 38,879.60 × 15,425.51
  4. Step 4: Simplify right side
    28,175.18x = 599,737,387.07
  5. Step 5: Solve for x
    x = 599,737,387.07/28,175.18
  6. Step 6: Final answer
    x = 21,286.02

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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.