Home / 15,129.44-20,872.80-11,159.96

Finding the Fourth Proportional to 15,129.44, 20,872.80 and 11,159.96

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Solution

The fourth proportional to 15,129.44, 20,872.80 and 11,159.96 is: 15,396.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.44 : 20,872.80 = 11,159.96 : x
  2. Step 2: Convert to fraction form
    15,129.44/20,872.80 = 11,159.96/x
  3. Step 3: Cross multiply
    15,129.44x = 20,872.80 × 11,159.96
  4. Step 4: Simplify right side
    15,129.44x = 232,939,613.09
  5. Step 5: Solve for x
    x = 232,939,613.09/15,129.44
  6. Step 6: Final answer
    x = 15,396.45

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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.