Home / 13,979.08-19,291.20-7,691.44

Finding the Fourth Proportional to 13,979.08, 19,291.20 and 7,691.44

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Solution

The fourth proportional to 13,979.08, 19,291.20 and 7,691.44 is: 10,614.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.08 : 19,291.20 = 7,691.44 : x
  2. Step 2: Convert to fraction form
    13,979.08/19,291.20 = 7,691.44/x
  3. Step 3: Cross multiply
    13,979.08x = 19,291.20 × 7,691.44
  4. Step 4: Simplify right side
    13,979.08x = 148,377,107.33
  5. Step 5: Solve for x
    x = 148,377,107.33/13,979.08
  6. Step 6: Final answer
    x = 10,614.23

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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.