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Finding the Fourth Proportional to 6,655.72, 9,186.18 and 3,861.64

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Solution

The fourth proportional to 6,655.72, 9,186.18 and 3,861.64 is: 5,329.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,655.72 : 9,186.18 = 3,861.64 : x
  2. Step 2: Convert to fraction form
    6,655.72/9,186.18 = 3,861.64/x
  3. Step 3: Cross multiply
    6,655.72x = 9,186.18 × 3,861.64
  4. Step 4: Simplify right side
    6,655.72x = 35,473,720.14
  5. Step 5: Solve for x
    x = 35,473,720.14/6,655.72
  6. Step 6: Final answer
    x = 5,329.81

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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.