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Finding the Fourth Proportional to 6,421.41, 8,861.13 and 3,768.66

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Solution

The fourth proportional to 6,421.41, 8,861.13 and 3,768.66 is: 5,200.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.41 : 8,861.13 = 3,768.66 : x
  2. Step 2: Convert to fraction form
    6,421.41/8,861.13 = 3,768.66/x
  3. Step 3: Cross multiply
    6,421.41x = 8,861.13 × 3,768.66
  4. Step 4: Simplify right side
    6,421.41x = 33,394,586.19
  5. Step 5: Solve for x
    x = 33,394,586.19/6,421.41
  6. Step 6: Final answer
    x = 5,200.51

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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.