Home / 28,912.66-43,335.96-13,129.72

Finding the Fourth Proportional to 28,912.66, 43,335.96 and 13,129.72

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Solution

The fourth proportional to 28,912.66, 43,335.96 and 13,129.72 is: 19,679.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,912.66 : 43,335.96 = 13,129.72 : x
  2. Step 2: Convert to fraction form
    28,912.66/43,335.96 = 13,129.72/x
  3. Step 3: Cross multiply
    28,912.66x = 43,335.96 × 13,129.72
  4. Step 4: Simplify right side
    28,912.66x = 568,989,020.73
  5. Step 5: Solve for x
    x = 568,989,020.73/28,912.66
  6. Step 6: Final answer
    x = 19,679.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.