Home / 13,724.40-18,937.82-8,679.72

Finding the Fourth Proportional to 13,724.40, 18,937.82 and 8,679.72

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Solution

The fourth proportional to 13,724.40, 18,937.82 and 8,679.72 is: 11,976.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.40 : 18,937.82 = 8,679.72 : x
  2. Step 2: Convert to fraction form
    13,724.40/18,937.82 = 8,679.72/x
  3. Step 3: Cross multiply
    13,724.40x = 18,937.82 × 8,679.72
  4. Step 4: Simplify right side
    13,724.40x = 164,374,975.01
  5. Step 5: Solve for x
    x = 164,374,975.01/13,724.40
  6. Step 6: Final answer
    x = 11,976.84

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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.