Home / 20,642.72-28,486.96-11,211.29

Finding the Fourth Proportional to 20,642.72, 28,486.96 and 11,211.29

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Solution

The fourth proportional to 20,642.72, 28,486.96 and 11,211.29 is: 15,471.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.72 : 28,486.96 = 11,211.29 : x
  2. Step 2: Convert to fraction form
    20,642.72/28,486.96 = 11,211.29/x
  3. Step 3: Cross multiply
    20,642.72x = 28,486.96 × 11,211.29
  4. Step 4: Simplify right side
    20,642.72x = 319,375,399.32
  5. Step 5: Solve for x
    x = 319,375,399.32/20,642.72
  6. Step 6: Final answer
    x = 15,471.57

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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.