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Finding the Fourth Proportional to 26,640.48, 39,953.77 and 7,916.11

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Solution

The fourth proportional to 26,640.48, 39,953.77 and 7,916.11 is: 11,872.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,640.48 : 39,953.77 = 7,916.11 : x
  2. Step 2: Convert to fraction form
    26,640.48/39,953.77 = 7,916.11/x
  3. Step 3: Cross multiply
    26,640.48x = 39,953.77 × 7,916.11
  4. Step 4: Simplify right side
    26,640.48x = 316,278,438.23
  5. Step 5: Solve for x
    x = 316,278,438.23/26,640.48
  6. Step 6: Final answer
    x = 11,872.10

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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.