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Finding the Fourth Proportional to 22,958.78, 34,431.65 and 8,915.81

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Solution

The fourth proportional to 22,958.78, 34,431.65 and 8,915.81 is: 13,371.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,958.78 : 34,431.65 = 8,915.81 : x
  2. Step 2: Convert to fraction form
    22,958.78/34,431.65 = 8,915.81/x
  3. Step 3: Cross multiply
    22,958.78x = 34,431.65 × 8,915.81
  4. Step 4: Simplify right side
    22,958.78x = 306,986,156.60
  5. Step 5: Solve for x
    x = 306,986,156.60/22,958.78
  6. Step 6: Final answer
    x = 13,371.19

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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.