Home / 5,121.31-7,680.30-2,000.53

Finding the Fourth Proportional to 5,121.31, 7,680.30 and 2,000.53

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Solution

The fourth proportional to 5,121.31, 7,680.30 and 2,000.53 is: 3,000.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.31 : 7,680.30 = 2,000.53 : x
  2. Step 2: Convert to fraction form
    5,121.31/7,680.30 = 2,000.53/x
  3. Step 3: Cross multiply
    5,121.31x = 7,680.30 × 2,000.53
  4. Step 4: Simplify right side
    5,121.31x = 15,364,670.56
  5. Step 5: Solve for x
    x = 15,364,670.56/5,121.31
  6. Step 6: Final answer
    x = 3,000.14

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1.5x scale

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.