Home / 20,800.62-28,704.87-11,369.18

Finding the Fourth Proportional to 20,800.62, 28,704.87 and 11,369.18

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Solution

The fourth proportional to 20,800.62, 28,704.87 and 11,369.18 is: 15,689.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.62 : 28,704.87 = 11,369.18 : x
  2. Step 2: Convert to fraction form
    20,800.62/28,704.87 = 11,369.18/x
  3. Step 3: Cross multiply
    20,800.62x = 28,704.87 × 11,369.18
  4. Step 4: Simplify right side
    20,800.62x = 326,350,905.67
  5. Step 5: Solve for x
    x = 326,350,905.67/20,800.62
  6. Step 6: Final answer
    x = 15,689.48

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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.