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Finding the Fourth Proportional to 6,638.66, 9,160.12 and 3,950.77

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Solution

The fourth proportional to 6,638.66, 9,160.12 and 3,950.77 is: 5,451.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.66 : 9,160.12 = 3,950.77 : x
  2. Step 2: Convert to fraction form
    6,638.66/9,160.12 = 3,950.77/x
  3. Step 3: Cross multiply
    6,638.66x = 9,160.12 × 3,950.77
  4. Step 4: Simplify right side
    6,638.66x = 36,189,527.29
  5. Step 5: Solve for x
    x = 36,189,527.29/6,638.66
  6. Step 6: Final answer
    x = 5,451.33

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Half scale
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Double scale
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Similar ratio
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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.