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Finding the Fourth Proportional to 6,138.60, 8,468.12 and 4,015.38

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Solution

The fourth proportional to 6,138.60, 8,468.12 and 4,015.38 is: 5,539.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,138.60 : 8,468.12 = 4,015.38 : x
  2. Step 2: Convert to fraction form
    6,138.60/8,468.12 = 4,015.38/x
  3. Step 3: Cross multiply
    6,138.60x = 8,468.12 × 4,015.38
  4. Step 4: Simplify right side
    6,138.60x = 34,002,719.69
  5. Step 5: Solve for x
    x = 34,002,719.69/6,138.60
  6. Step 6: Final answer
    x = 5,539.17

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Double scale
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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.