Home / 13,979.38-20,961.88-4,117.36

Finding the Fourth Proportional to 13,979.38, 20,961.88 and 4,117.36

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Solution

The fourth proportional to 13,979.38, 20,961.88 and 4,117.36 is: 6,173.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.38 : 20,961.88 = 4,117.36 : x
  2. Step 2: Convert to fraction form
    13,979.38/20,961.88 = 4,117.36/x
  3. Step 3: Cross multiply
    13,979.38x = 20,961.88 × 4,117.36
  4. Step 4: Simplify right side
    13,979.38x = 86,307,606.24
  5. Step 5: Solve for x
    x = 86,307,606.24/13,979.38
  6. Step 6: Final answer
    x = 6,173.92

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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.