Home / 28,258.21-42,357.79-9,531.78

Finding the Fourth Proportional to 28,258.21, 42,357.79 and 9,531.78

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Solution

The fourth proportional to 28,258.21, 42,357.79 and 9,531.78 is: 14,287.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,258.21 : 42,357.79 = 9,531.78 : x
  2. Step 2: Convert to fraction form
    28,258.21/42,357.79 = 9,531.78/x
  3. Step 3: Cross multiply
    28,258.21x = 42,357.79 × 9,531.78
  4. Step 4: Simplify right side
    28,258.21x = 403,745,135.57
  5. Step 5: Solve for x
    x = 403,745,135.57/28,258.21
  6. Step 6: Final answer
    x = 14,287.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.