Home / 7,145.20-10,719.50-2,982.90

Finding the Fourth Proportional to 7,145.20, 10,719.50 and 2,982.90

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Solution

The fourth proportional to 7,145.20, 10,719.50 and 2,982.90 is: 4,475.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.20 : 10,719.50 = 2,982.90 : x
  2. Step 2: Convert to fraction form
    7,145.20/10,719.50 = 2,982.90/x
  3. Step 3: Cross multiply
    7,145.20x = 10,719.50 × 2,982.90
  4. Step 4: Simplify right side
    7,145.20x = 31,975,196.55
  5. Step 5: Solve for x
    x = 31,975,196.55/7,145.20
  6. Step 6: Final answer
    x = 4,475.06

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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.