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Finding the Fourth Proportional to 26,687.78, 40,027.11 and 8,916.81

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Solution

The fourth proportional to 26,687.78, 40,027.11 and 8,916.81 is: 13,373.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,687.78 : 40,027.11 = 8,916.81 : x
  2. Step 2: Convert to fraction form
    26,687.78/40,027.11 = 8,916.81/x
  3. Step 3: Cross multiply
    26,687.78x = 40,027.11 × 8,916.81
  4. Step 4: Simplify right side
    26,687.78x = 356,914,113.91
  5. Step 5: Solve for x
    x = 356,914,113.91/26,687.78
  6. Step 6: Final answer
    x = 13,373.69

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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.