Home / 5,459.40-8,189.10-3,119.40

Finding the Fourth Proportional to 5,459.40, 8,189.10 and 3,119.40

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Solution

The fourth proportional to 5,459.40, 8,189.10 and 3,119.40 is: 4,679.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,459.40 : 8,189.10 = 3,119.40 : x
  2. Step 2: Convert to fraction form
    5,459.40/8,189.10 = 3,119.40/x
  3. Step 3: Cross multiply
    5,459.40x = 8,189.10 × 3,119.40
  4. Step 4: Simplify right side
    5,459.40x = 25,545,078.54
  5. Step 5: Solve for x
    x = 25,545,078.54/5,459.40
  6. Step 6: Final answer
    x = 4,679.10

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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.