Home / 20,764.36-31,109.10-11,394.28

Finding the Fourth Proportional to 20,764.36, 31,109.10 and 11,394.28

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Solution

The fourth proportional to 20,764.36, 31,109.10 and 11,394.28 is: 17,070.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.36 : 31,109.10 = 11,394.28 : x
  2. Step 2: Convert to fraction form
    20,764.36/31,109.10 = 11,394.28/x
  3. Step 3: Cross multiply
    20,764.36x = 31,109.10 × 11,394.28
  4. Step 4: Simplify right side
    20,764.36x = 354,465,795.95
  5. Step 5: Solve for x
    x = 354,465,795.95/20,764.36
  6. Step 6: Final answer
    x = 17,070.88

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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.