Home / 5,280-7,916.22-1,992.84

Finding the Fourth Proportional to 5,280, 7,916.22 and 1,992.84

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Solution

The fourth proportional to 5,280, 7,916.22 and 1,992.84 is: 2,987.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280 : 7,916.22 = 1,992.84 : x
  2. Step 2: Convert to fraction form
    5,280/7,916.22 = 1,992.84/x
  3. Step 3: Cross multiply
    5,280x = 7,916.22 × 1,992.84
  4. Step 4: Simplify right side
    5,280x = 15,775,759.86
  5. Step 5: Solve for x
    x = 15,775,759.86/5,280
  6. Step 6: Final answer
    x = 2,987.83

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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.