Home / 13,640.10-20,456.10-5,315.33

Finding the Fourth Proportional to 13,640.10, 20,456.10 and 5,315.33

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Solution

The fourth proportional to 13,640.10, 20,456.10 and 5,315.33 is: 7,971.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.10 : 20,456.10 = 5,315.33 : x
  2. Step 2: Convert to fraction form
    13,640.10/20,456.10 = 5,315.33/x
  3. Step 3: Cross multiply
    13,640.10x = 20,456.10 × 5,315.33
  4. Step 4: Simplify right side
    13,640.10x = 108,730,819.73
  5. Step 5: Solve for x
    x = 108,730,819.73/13,640.10
  6. Step 6: Final answer
    x = 7,971.41

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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.