Home / 6,920.05-10,380.04-4,147.55

Finding the Fourth Proportional to 6,920.05, 10,380.04 and 4,147.55

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Solution

The fourth proportional to 6,920.05, 10,380.04 and 4,147.55 is: 6,221.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.05 : 10,380.04 = 4,147.55 : x
  2. Step 2: Convert to fraction form
    6,920.05/10,380.04 = 4,147.55/x
  3. Step 3: Cross multiply
    6,920.05x = 10,380.04 × 4,147.55
  4. Step 4: Simplify right side
    6,920.05x = 43,051,734.90
  5. Step 5: Solve for x
    x = 43,051,734.90/6,920.05
  6. Step 6: Final answer
    x = 6,221.30

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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.