Home / 5,151.78-7,720.29-2,551.74

Finding the Fourth Proportional to 5,151.78, 7,720.29 and 2,551.74

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Solution

The fourth proportional to 5,151.78, 7,720.29 and 2,551.74 is: 3,823.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.78 : 7,720.29 = 2,551.74 : x
  2. Step 2: Convert to fraction form
    5,151.78/7,720.29 = 2,551.74/x
  3. Step 3: Cross multiply
    5,151.78x = 7,720.29 × 2,551.74
  4. Step 4: Simplify right side
    5,151.78x = 19,700,172.80
  5. Step 5: Solve for x
    x = 19,700,172.80/5,151.78
  6. Step 6: Final answer
    x = 3,823.95

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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.