Home / 6,820.45-9,415.38-5,142.55

Finding the Fourth Proportional to 6,820.45, 9,415.38 and 5,142.55

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Solution

The fourth proportional to 6,820.45, 9,415.38 and 5,142.55 is: 7,099.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,820.45 : 9,415.38 = 5,142.55 : x
  2. Step 2: Convert to fraction form
    6,820.45/9,415.38 = 5,142.55/x
  3. Step 3: Cross multiply
    6,820.45x = 9,415.38 × 5,142.55
  4. Step 4: Simplify right side
    6,820.45x = 48,419,062.42
  5. Step 5: Solve for x
    x = 48,419,062.42/6,820.45
  6. Step 6: Final answer
    x = 7,099.10

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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.