Home / 20,778.24-31,094.40-17,891.36

Finding the Fourth Proportional to 20,778.24, 31,094.40 and 17,891.36

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Solution

The fourth proportional to 20,778.24, 31,094.40 and 17,891.36 is: 26,774.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.24 : 31,094.40 = 17,891.36 : x
  2. Step 2: Convert to fraction form
    20,778.24/31,094.40 = 17,891.36/x
  3. Step 3: Cross multiply
    20,778.24x = 31,094.40 × 17,891.36
  4. Step 4: Simplify right side
    20,778.24x = 556,321,104.38
  5. Step 5: Solve for x
    x = 556,321,104.38/20,778.24
  6. Step 6: Final answer
    x = 26,774.22

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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.