Home / 20,231.24-27,920.08-11,278.82

Finding the Fourth Proportional to 20,231.24, 27,920.08 and 11,278.82

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Solution

The fourth proportional to 20,231.24, 27,920.08 and 11,278.82 is: 15,565.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.24 : 27,920.08 = 11,278.82 : x
  2. Step 2: Convert to fraction form
    20,231.24/27,920.08 = 11,278.82/x
  3. Step 3: Cross multiply
    20,231.24x = 27,920.08 × 11,278.82
  4. Step 4: Simplify right side
    20,231.24x = 314,905,556.71
  5. Step 5: Solve for x
    x = 314,905,556.71/20,231.24
  6. Step 6: Final answer
    x = 15,565.31

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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.