Home / 8,585.48-12,878.78-3,390.92

Finding the Fourth Proportional to 8,585.48, 12,878.78 and 3,390.92

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Solution

The fourth proportional to 8,585.48, 12,878.78 and 3,390.92 is: 5,086.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,585.48 : 12,878.78 = 3,390.92 : x
  2. Step 2: Convert to fraction form
    8,585.48/12,878.78 = 3,390.92/x
  3. Step 3: Cross multiply
    8,585.48x = 12,878.78 × 3,390.92
  4. Step 4: Simplify right side
    8,585.48x = 43,670,912.68
  5. Step 5: Solve for x
    x = 43,670,912.68/8,585.48
  6. Step 6: Final answer
    x = 5,086.60

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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.