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Finding the Fourth Proportional to 28,978.66, 43,469.97 and 9,258.71

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Solution

The fourth proportional to 28,978.66, 43,469.97 and 9,258.71 is: 13,888.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.66 : 43,469.97 = 9,258.71 : x
  2. Step 2: Convert to fraction form
    28,978.66/43,469.97 = 9,258.71/x
  3. Step 3: Cross multiply
    28,978.66x = 43,469.97 × 9,258.71
  4. Step 4: Simplify right side
    28,978.66x = 402,475,593.87
  5. Step 5: Solve for x
    x = 402,475,593.87/28,978.66
  6. Step 6: Final answer
    x = 13,888.69

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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.