Home / 20,638.54-28,481.16-11,207.14

Finding the Fourth Proportional to 20,638.54, 28,481.16 and 11,207.14

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Solution

The fourth proportional to 20,638.54, 28,481.16 and 11,207.14 is: 15,465.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.54 : 28,481.16 = 11,207.14 : x
  2. Step 2: Convert to fraction form
    20,638.54/28,481.16 = 11,207.14/x
  3. Step 3: Cross multiply
    20,638.54x = 28,481.16 × 11,207.14
  4. Step 4: Simplify right side
    20,638.54x = 319,192,347.48
  5. Step 5: Solve for x
    x = 319,192,347.48/20,638.54
  6. Step 6: Final answer
    x = 15,465.84

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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.