Home / 20,659.91-28,524.40-15,871.32

Finding the Fourth Proportional to 20,659.91, 28,524.40 and 15,871.32

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Solution

The fourth proportional to 20,659.91, 28,524.40 and 15,871.32 is: 21,912.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.91 : 28,524.40 = 15,871.32 : x
  2. Step 2: Convert to fraction form
    20,659.91/28,524.40 = 15,871.32/x
  3. Step 3: Cross multiply
    20,659.91x = 28,524.40 × 15,871.32
  4. Step 4: Simplify right side
    20,659.91x = 452,719,840.53
  5. Step 5: Solve for x
    x = 452,719,840.53/20,659.91
  6. Step 6: Final answer
    x = 21,912.97

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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.