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Finding the Fourth Proportional to 26,381.30, 39,565.80 and 12,351

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Solution

The fourth proportional to 26,381.30, 39,565.80 and 12,351 is: 18,523.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,381.30 : 39,565.80 = 12,351 : x
  2. Step 2: Convert to fraction form
    26,381.30/39,565.80 = 12,351/x
  3. Step 3: Cross multiply
    26,381.30x = 39,565.80 × 12,351
  4. Step 4: Simplify right side
    26,381.30x = 488,677,195.80
  5. Step 5: Solve for x
    x = 488,677,195.80/26,381.30
  6. Step 6: Final answer
    x = 18,523.62

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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.