Home / 15,105.26-20,845.71-9,138.02

Finding the Fourth Proportional to 15,105.26, 20,845.71 and 9,138.02

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Solution

The fourth proportional to 15,105.26, 20,845.71 and 9,138.02 is: 12,610.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,105.26 : 20,845.71 = 9,138.02 : x
  2. Step 2: Convert to fraction form
    15,105.26/20,845.71 = 9,138.02/x
  3. Step 3: Cross multiply
    15,105.26x = 20,845.71 × 9,138.02
  4. Step 4: Simplify right side
    15,105.26x = 190,488,514.89
  5. Step 5: Solve for x
    x = 190,488,514.89/15,105.26
  6. Step 6: Final answer
    x = 12,610.74

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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.