Home / 20,178.78-27,845.01-11,679.18

Finding the Fourth Proportional to 20,178.78, 27,845.01 and 11,679.18

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Solution

The fourth proportional to 20,178.78, 27,845.01 and 11,679.18 is: 16,116.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178.78 : 27,845.01 = 11,679.18 : x
  2. Step 2: Convert to fraction form
    20,178.78/27,845.01 = 11,679.18/x
  3. Step 3: Cross multiply
    20,178.78x = 27,845.01 × 11,679.18
  4. Step 4: Simplify right side
    20,178.78x = 325,206,883.89
  5. Step 5: Solve for x
    x = 325,206,883.89/20,178.78
  6. Step 6: Final answer
    x = 16,116.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.