Home / 5,121.45-7,682.13-2,812.95

Finding the Fourth Proportional to 5,121.45, 7,682.13 and 2,812.95

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Solution

The fourth proportional to 5,121.45, 7,682.13 and 2,812.95 is: 4,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.45 : 7,682.13 = 2,812.95 : x
  2. Step 2: Convert to fraction form
    5,121.45/7,682.13 = 2,812.95/x
  3. Step 3: Cross multiply
    5,121.45x = 7,682.13 × 2,812.95
  4. Step 4: Simplify right side
    5,121.45x = 21,609,447.58
  5. Step 5: Solve for x
    x = 21,609,447.58/5,121.45
  6. Step 6: Final answer
    x = 4,219.40

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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.