Home / 7,281.32-10,921.92-2,087.20

Finding the Fourth Proportional to 7,281.32, 10,921.92 and 2,087.20

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Solution

The fourth proportional to 7,281.32, 10,921.92 and 2,087.20 is: 3,130.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,281.32 : 10,921.92 = 2,087.20 : x
  2. Step 2: Convert to fraction form
    7,281.32/10,921.92 = 2,087.20/x
  3. Step 3: Cross multiply
    7,281.32x = 10,921.92 × 2,087.20
  4. Step 4: Simplify right side
    7,281.32x = 22,796,231.42
  5. Step 5: Solve for x
    x = 22,796,231.42/7,281.32
  6. Step 6: Final answer
    x = 3,130.78

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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.