Home / 7,685.80-11,528.62-2,138.60

Finding the Fourth Proportional to 7,685.80, 11,528.62 and 2,138.60

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Solution

The fourth proportional to 7,685.80, 11,528.62 and 2,138.60 is: 3,207.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,685.80 : 11,528.62 = 2,138.60 : x
  2. Step 2: Convert to fraction form
    7,685.80/11,528.62 = 2,138.60/x
  3. Step 3: Cross multiply
    7,685.80x = 11,528.62 × 2,138.60
  4. Step 4: Simplify right side
    7,685.80x = 24,655,106.73
  5. Step 5: Solve for x
    x = 24,655,106.73/7,685.80
  6. Step 6: Final answer
    x = 3,207.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.