Home / 6,689.38-9,228.98-3,998.73

Finding the Fourth Proportional to 6,689.38, 9,228.98 and 3,998.73

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Solution

The fourth proportional to 6,689.38, 9,228.98 and 3,998.73 is: 5,516.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,689.38 : 9,228.98 = 3,998.73 : x
  2. Step 2: Convert to fraction form
    6,689.38/9,228.98 = 3,998.73/x
  3. Step 3: Cross multiply
    6,689.38x = 9,228.98 × 3,998.73
  4. Step 4: Simplify right side
    6,689.38x = 36,904,176.75
  5. Step 5: Solve for x
    x = 36,904,176.75/6,689.38
  6. Step 6: Final answer
    x = 5,516.83

Related Problems

Find fourth proportional to 3,344.69, 4,614.49 and 1,999.36
Half scale
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Double scale
Find fourth proportional to 6,690.38, 9,230.36 and 3,999.73
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.