Home / 20,231.16-27,919.12-11,279.23

Finding the Fourth Proportional to 20,231.16, 27,919.12 and 11,279.23

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Solution

The fourth proportional to 20,231.16, 27,919.12 and 11,279.23 is: 15,565.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.16 : 27,919.12 = 11,279.23 : x
  2. Step 2: Convert to fraction form
    20,231.16/27,919.12 = 11,279.23/x
  3. Step 3: Cross multiply
    20,231.16x = 27,919.12 × 11,279.23
  4. Step 4: Simplify right side
    20,231.16x = 314,906,175.88
  5. Step 5: Solve for x
    x = 314,906,175.88/20,231.16
  6. Step 6: Final answer
    x = 15,565.40

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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.