Home / 20,638.68-28,481.13-11,207.31

Finding the Fourth Proportional to 20,638.68, 28,481.13 and 11,207.31

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Solution

The fourth proportional to 20,638.68, 28,481.13 and 11,207.31 is: 15,465.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.68 : 28,481.13 = 11,207.31 : x
  2. Step 2: Convert to fraction form
    20,638.68/28,481.13 = 11,207.31/x
  3. Step 3: Cross multiply
    20,638.68x = 28,481.13 × 11,207.31
  4. Step 4: Simplify right side
    20,638.68x = 319,196,853.06
  5. Step 5: Solve for x
    x = 319,196,853.06/20,638.68
  6. Step 6: Final answer
    x = 15,465.95

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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.