Home / 28,170.72-38,876.19-15,424.44

Finding the Fourth Proportional to 28,170.72, 38,876.19 and 15,424.44

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Solution

The fourth proportional to 28,170.72, 38,876.19 and 15,424.44 is: 21,286.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,170.72 : 38,876.19 = 15,424.44 : x
  2. Step 2: Convert to fraction form
    28,170.72/38,876.19 = 15,424.44/x
  3. Step 3: Cross multiply
    28,170.72x = 38,876.19 × 15,424.44
  4. Step 4: Simplify right side
    28,170.72x = 599,643,460.08
  5. Step 5: Solve for x
    x = 599,643,460.08/28,170.72
  6. Step 6: Final answer
    x = 21,286.05

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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.