Home / 20,638.81-28,481.30-11,207.44

Finding the Fourth Proportional to 20,638.81, 28,481.30 and 11,207.44

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Solution

The fourth proportional to 20,638.81, 28,481.30 and 11,207.44 is: 15,466.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.81 : 28,481.30 = 11,207.44 : x
  2. Step 2: Convert to fraction form
    20,638.81/28,481.30 = 11,207.44/x
  3. Step 3: Cross multiply
    20,638.81x = 28,481.30 × 11,207.44
  4. Step 4: Simplify right side
    20,638.81x = 319,202,318.47
  5. Step 5: Solve for x
    x = 319,202,318.47/20,638.81
  6. Step 6: Final answer
    x = 15,466.12

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1.5x scale

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.