Home / 7,821.55-11,731.34-2,556.12

Finding the Fourth Proportional to 7,821.55, 11,731.34 and 2,556.12

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Solution

The fourth proportional to 7,821.55, 11,731.34 and 2,556.12 is: 3,833.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.55 : 11,731.34 = 2,556.12 : x
  2. Step 2: Convert to fraction form
    7,821.55/11,731.34 = 2,556.12/x
  3. Step 3: Cross multiply
    7,821.55x = 11,731.34 × 2,556.12
  4. Step 4: Simplify right side
    7,821.55x = 29,986,689.86
  5. Step 5: Solve for x
    x = 29,986,689.86/7,821.55
  6. Step 6: Final answer
    x = 3,833.86

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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.