Home / 6,861.42-9,468.65-3,878.21

Finding the Fourth Proportional to 6,861.42, 9,468.65 and 3,878.21

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Solution

The fourth proportional to 6,861.42, 9,468.65 and 3,878.21 is: 5,351.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,861.42 : 9,468.65 = 3,878.21 : x
  2. Step 2: Convert to fraction form
    6,861.42/9,468.65 = 3,878.21/x
  3. Step 3: Cross multiply
    6,861.42x = 9,468.65 × 3,878.21
  4. Step 4: Simplify right side
    6,861.42x = 36,721,346.38
  5. Step 5: Solve for x
    x = 36,721,346.38/6,861.42
  6. Step 6: Final answer
    x = 5,351.86

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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.