Home / 31,619.75-43,644.35-20,872.47

Finding the Fourth Proportional to 31,619.75, 43,644.35 and 20,872.47

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Solution

The fourth proportional to 31,619.75, 43,644.35 and 20,872.47 is: 28,810.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,619.75 : 43,644.35 = 20,872.47 : x
  2. Step 2: Convert to fraction form
    31,619.75/43,644.35 = 20,872.47/x
  3. Step 3: Cross multiply
    31,619.75x = 43,644.35 × 20,872.47
  4. Step 4: Simplify right side
    31,619.75x = 910,965,438.23
  5. Step 5: Solve for x
    x = 910,965,438.23/31,619.75
  6. Step 6: Final answer
    x = 28,810.02

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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.