Home / 13,979.29-20,968.90-4,118.56

Finding the Fourth Proportional to 13,979.29, 20,968.90 and 4,118.56

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Solution

The fourth proportional to 13,979.29, 20,968.90 and 4,118.56 is: 6,177.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.29 : 20,968.90 = 4,118.56 : x
  2. Step 2: Convert to fraction form
    13,979.29/20,968.90 = 4,118.56/x
  3. Step 3: Cross multiply
    13,979.29x = 20,968.90 × 4,118.56
  4. Step 4: Simplify right side
    13,979.29x = 86,361,672.78
  5. Step 5: Solve for x
    x = 86,361,672.78/13,979.29
  6. Step 6: Final answer
    x = 6,177.83

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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.