Home / 26,305.20-39,438.36-12,438

Finding the Fourth Proportional to 26,305.20, 39,438.36 and 12,438

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Solution

The fourth proportional to 26,305.20, 39,438.36 and 12,438 is: 18,647.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,305.20 : 39,438.36 = 12,438 : x
  2. Step 2: Convert to fraction form
    26,305.20/39,438.36 = 12,438/x
  3. Step 3: Cross multiply
    26,305.20x = 39,438.36 × 12,438
  4. Step 4: Simplify right side
    26,305.20x = 490,534,321.68
  5. Step 5: Solve for x
    x = 490,534,321.68/26,305.20
  6. Step 6: Final answer
    x = 18,647.81

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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.