Home / 15,221.32-20,999.64-11,251.96

Finding the Fourth Proportional to 15,221.32, 20,999.64 and 11,251.96

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Solution

The fourth proportional to 15,221.32, 20,999.64 and 11,251.96 is: 15,523.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.32 : 20,999.64 = 11,251.96 : x
  2. Step 2: Convert to fraction form
    15,221.32/20,999.64 = 11,251.96/x
  3. Step 3: Cross multiply
    15,221.32x = 20,999.64 × 11,251.96
  4. Step 4: Simplify right side
    15,221.32x = 236,287,109.29
  5. Step 5: Solve for x
    x = 236,287,109.29/15,221.32
  6. Step 6: Final answer
    x = 15,523.43

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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.