Home / 20,638.62-28,481.58-11,685.93

Finding the Fourth Proportional to 20,638.62, 28,481.58 and 11,685.93

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Solution

The fourth proportional to 20,638.62, 28,481.58 and 11,685.93 is: 16,126.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.62 : 28,481.58 = 11,685.93 : x
  2. Step 2: Convert to fraction form
    20,638.62/28,481.58 = 11,685.93/x
  3. Step 3: Cross multiply
    20,638.62x = 28,481.58 × 11,685.93
  4. Step 4: Simplify right side
    20,638.62x = 332,833,750.17
  5. Step 5: Solve for x
    x = 332,833,750.17/20,638.62
  6. Step 6: Final answer
    x = 16,126.74

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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.