Home / 6,827.60-9,419-4,138.40

Finding the Fourth Proportional to 6,827.60, 9,419 and 4,138.40

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Solution

The fourth proportional to 6,827.60, 9,419 and 4,138.40 is: 5,709.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,827.60 : 9,419 = 4,138.40 : x
  2. Step 2: Convert to fraction form
    6,827.60/9,419 = 4,138.40/x
  3. Step 3: Cross multiply
    6,827.60x = 9,419 × 4,138.40
  4. Step 4: Simplify right side
    6,827.60x = 38,979,589.60
  5. Step 5: Solve for x
    x = 38,979,589.60/6,827.60
  6. Step 6: Final answer
    x = 5,709.12

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Half scale
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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.