Home / 8,386.40-12,579.60-3,778.40

Finding the Fourth Proportional to 8,386.40, 12,579.60 and 3,778.40

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Solution

The fourth proportional to 8,386.40, 12,579.60 and 3,778.40 is: 5,667.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,386.40 : 12,579.60 = 3,778.40 : x
  2. Step 2: Convert to fraction form
    8,386.40/12,579.60 = 3,778.40/x
  3. Step 3: Cross multiply
    8,386.40x = 12,579.60 × 3,778.40
  4. Step 4: Simplify right side
    8,386.40x = 47,530,760.64
  5. Step 5: Solve for x
    x = 47,530,760.64/8,386.40
  6. Step 6: Final answer
    x = 5,667.60

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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.