Home / 6,821.45-9,416.76-5,143.55

Finding the Fourth Proportional to 6,821.45, 9,416.76 and 5,143.55

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Solution

The fourth proportional to 6,821.45, 9,416.76 and 5,143.55 is: 7,100.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,821.45 : 9,416.76 = 5,143.55 : x
  2. Step 2: Convert to fraction form
    6,821.45/9,416.76 = 5,143.55/x
  3. Step 3: Cross multiply
    6,821.45x = 9,416.76 × 5,143.55
  4. Step 4: Simplify right side
    6,821.45x = 48,435,575.90
  5. Step 5: Solve for x
    x = 48,435,575.90/6,821.45
  6. Step 6: Final answer
    x = 7,100.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.