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Finding the Fourth Proportional to 8,915.73, 13,366.06 and 5,621.56

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Solution

The fourth proportional to 8,915.73, 13,366.06 and 5,621.56 is: 8,427.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.73 : 13,366.06 = 5,621.56 : x
  2. Step 2: Convert to fraction form
    8,915.73/13,366.06 = 5,621.56/x
  3. Step 3: Cross multiply
    8,915.73x = 13,366.06 × 5,621.56
  4. Step 4: Simplify right side
    8,915.73x = 75,138,108.25
  5. Step 5: Solve for x
    x = 75,138,108.25/8,915.73
  6. Step 6: Final answer
    x = 8,427.59

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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.