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Finding the Fourth Proportional to 8,916.95, 13,363.04 and 8,650.87

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Solution

The fourth proportional to 8,916.95, 13,363.04 and 8,650.87 is: 12,964.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.95 : 13,363.04 = 8,650.87 : x
  2. Step 2: Convert to fraction form
    8,916.95/13,363.04 = 8,650.87/x
  3. Step 3: Cross multiply
    8,916.95x = 13,363.04 × 8,650.87
  4. Step 4: Simplify right side
    8,916.95x = 115,601,910.06
  5. Step 5: Solve for x
    x = 115,601,910.06/8,916.95
  6. Step 6: Final answer
    x = 12,964.28

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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.