Home / 5,275.20-7,912.98-1,812.72

Finding the Fourth Proportional to 5,275.20, 7,912.98 and 1,812.72

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Solution

The fourth proportional to 5,275.20, 7,912.98 and 1,812.72 is: 2,719.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.20 : 7,912.98 = 1,812.72 : x
  2. Step 2: Convert to fraction form
    5,275.20/7,912.98 = 1,812.72/x
  3. Step 3: Cross multiply
    5,275.20x = 7,912.98 × 1,812.72
  4. Step 4: Simplify right side
    5,275.20x = 14,344,017.11
  5. Step 5: Solve for x
    x = 14,344,017.11/5,275.20
  6. Step 6: Final answer
    x = 2,719.14

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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.