Home / 13,679.28-18,878.82-8,377.60

Finding the Fourth Proportional to 13,679.28, 18,878.82 and 8,377.60

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Solution

The fourth proportional to 13,679.28, 18,878.82 and 8,377.60 is: 11,561.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.28 : 18,878.82 = 8,377.60 : x
  2. Step 2: Convert to fraction form
    13,679.28/18,878.82 = 8,377.60/x
  3. Step 3: Cross multiply
    13,679.28x = 18,878.82 × 8,377.60
  4. Step 4: Simplify right side
    13,679.28x = 158,159,202.43
  5. Step 5: Solve for x
    x = 158,159,202.43/13,679.28
  6. Step 6: Final answer
    x = 11,561.95

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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.