Home / 20,231.32-27,920.22-11,279.56

Finding the Fourth Proportional to 20,231.32, 27,920.22 and 11,279.56

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Solution

The fourth proportional to 20,231.32, 27,920.22 and 11,279.56 is: 15,566.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.32 : 27,920.22 = 11,279.56 : x
  2. Step 2: Convert to fraction form
    20,231.32/27,920.22 = 11,279.56/x
  3. Step 3: Cross multiply
    20,231.32x = 27,920.22 × 11,279.56
  4. Step 4: Simplify right side
    20,231.32x = 314,927,796.70
  5. Step 5: Solve for x
    x = 314,927,796.70/20,231.32
  6. Step 6: Final answer
    x = 15,566.35

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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.