Home / 20,638.53-28,481.18-11,207.10

Finding the Fourth Proportional to 20,638.53, 28,481.18 and 11,207.10

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Solution

The fourth proportional to 20,638.53, 28,481.18 and 11,207.10 is: 15,465.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.53 : 28,481.18 = 11,207.10 : x
  2. Step 2: Convert to fraction form
    20,638.53/28,481.18 = 11,207.10/x
  3. Step 3: Cross multiply
    20,638.53x = 28,481.18 × 11,207.10
  4. Step 4: Simplify right side
    20,638.53x = 319,191,233.94
  5. Step 5: Solve for x
    x = 319,191,233.94/20,638.53
  6. Step 6: Final answer
    x = 15,465.79

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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.