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Finding the Fourth Proportional to 8,916.66, 13,372.28 and 3,721.32

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Solution

The fourth proportional to 8,916.66, 13,372.28 and 3,721.32 is: 5,580.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.66 : 13,372.28 = 3,721.32 : x
  2. Step 2: Convert to fraction form
    8,916.66/13,372.28 = 3,721.32/x
  3. Step 3: Cross multiply
    8,916.66x = 13,372.28 × 3,721.32
  4. Step 4: Simplify right side
    8,916.66x = 49,762,514.40
  5. Step 5: Solve for x
    x = 49,762,514.40/8,916.66
  6. Step 6: Final answer
    x = 5,580.85

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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.