Home / 26,781.40-40,155.90-11,987.56

Finding the Fourth Proportional to 26,781.40, 40,155.90 and 11,987.56

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Solution

The fourth proportional to 26,781.40, 40,155.90 and 11,987.56 is: 17,974.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,781.40 : 40,155.90 = 11,987.56 : x
  2. Step 2: Convert to fraction form
    26,781.40/40,155.90 = 11,987.56/x
  3. Step 3: Cross multiply
    26,781.40x = 40,155.90 × 11,987.56
  4. Step 4: Simplify right side
    26,781.40x = 481,371,260.60
  5. Step 5: Solve for x
    x = 481,371,260.60/26,781.40
  6. Step 6: Final answer
    x = 17,974.09

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1.5x scale

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.