Home / 5,119.18-7,678.40-1,998.60

Finding the Fourth Proportional to 5,119.18, 7,678.40 and 1,998.60

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Solution

The fourth proportional to 5,119.18, 7,678.40 and 1,998.60 is: 2,997.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.18 : 7,678.40 = 1,998.60 : x
  2. Step 2: Convert to fraction form
    5,119.18/7,678.40 = 1,998.60/x
  3. Step 3: Cross multiply
    5,119.18x = 7,678.40 × 1,998.60
  4. Step 4: Simplify right side
    5,119.18x = 15,346,001.86
  5. Step 5: Solve for x
    x = 15,346,001.86/5,119.18
  6. Step 6: Final answer
    x = 2,997.75

Related Problems

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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.