Home / 6,685.19-9,225.56-3,890.69

Finding the Fourth Proportional to 6,685.19, 9,225.56 and 3,890.69

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Solution

The fourth proportional to 6,685.19, 9,225.56 and 3,890.69 is: 5,369.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,685.19 : 9,225.56 = 3,890.69 : x
  2. Step 2: Convert to fraction form
    6,685.19/9,225.56 = 3,890.69/x
  3. Step 3: Cross multiply
    6,685.19x = 9,225.56 × 3,890.69
  4. Step 4: Simplify right side
    6,685.19x = 35,893,794.04
  5. Step 5: Solve for x
    x = 35,893,794.04/6,685.19
  6. Step 6: Final answer
    x = 5,369.15

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Half scale
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Double scale
Find fourth proportional to 6,686.19, 9,226.94 and 3,891.69
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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.