Home / 28,318.25-39,079.19-15,745.43

Finding the Fourth Proportional to 28,318.25, 39,079.19 and 15,745.43

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Solution

The fourth proportional to 28,318.25, 39,079.19 and 15,745.43 is: 21,728.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.25 : 39,079.19 = 15,745.43 : x
  2. Step 2: Convert to fraction form
    28,318.25/39,079.19 = 15,745.43/x
  3. Step 3: Cross multiply
    28,318.25x = 39,079.19 × 15,745.43
  4. Step 4: Simplify right side
    28,318.25x = 615,318,650.60
  5. Step 5: Solve for x
    x = 615,318,650.60/28,318.25
  6. Step 6: Final answer
    x = 21,728.70

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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.