Home / 20,786.75-31,159.37-7,456.13

Finding the Fourth Proportional to 20,786.75, 31,159.37 and 7,456.13

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Solution

The fourth proportional to 20,786.75, 31,159.37 and 7,456.13 is: 11,176.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.75 : 31,159.37 = 7,456.13 : x
  2. Step 2: Convert to fraction form
    20,786.75/31,159.37 = 7,456.13/x
  3. Step 3: Cross multiply
    20,786.75x = 31,159.37 × 7,456.13
  4. Step 4: Simplify right side
    20,786.75x = 232,328,368.60
  5. Step 5: Solve for x
    x = 232,328,368.60/20,786.75
  6. Step 6: Final answer
    x = 11,176.75

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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.