Home / 13,724.04-18,932.19-8,679.78

Finding the Fourth Proportional to 13,724.04, 18,932.19 and 8,679.78

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Solution

The fourth proportional to 13,724.04, 18,932.19 and 8,679.78 is: 11,973.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.04 : 18,932.19 = 8,679.78 : x
  2. Step 2: Convert to fraction form
    13,724.04/18,932.19 = 8,679.78/x
  3. Step 3: Cross multiply
    13,724.04x = 18,932.19 × 8,679.78
  4. Step 4: Simplify right side
    13,724.04x = 164,327,244.12
  5. Step 5: Solve for x
    x = 164,327,244.12/13,724.04
  6. Step 6: Final answer
    x = 11,973.68

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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.