Home / 5,118.39-7,678.58-1,998.27

Finding the Fourth Proportional to 5,118.39, 7,678.58 and 1,998.27

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Solution

The fourth proportional to 5,118.39, 7,678.58 and 1,998.27 is: 2,997.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.39 : 7,678.58 = 1,998.27 : x
  2. Step 2: Convert to fraction form
    5,118.39/7,678.58 = 1,998.27/x
  3. Step 3: Cross multiply
    5,118.39x = 7,678.58 × 1,998.27
  4. Step 4: Simplify right side
    5,118.39x = 15,343,866.07
  5. Step 5: Solve for x
    x = 15,343,866.07/5,118.39
  6. Step 6: Final answer
    x = 2,997.79

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.