Home / 13,664.20-18,856.88-8,286.60

Finding the Fourth Proportional to 13,664.20, 18,856.88 and 8,286.60

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Solution

The fourth proportional to 13,664.20, 18,856.88 and 8,286.60 is: 11,435.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,664.20 : 18,856.88 = 8,286.60 : x
  2. Step 2: Convert to fraction form
    13,664.20/18,856.88 = 8,286.60/x
  3. Step 3: Cross multiply
    13,664.20x = 18,856.88 × 8,286.60
  4. Step 4: Simplify right side
    13,664.20x = 156,259,421.81
  5. Step 5: Solve for x
    x = 156,259,421.81/13,664.20
  6. Step 6: Final answer
    x = 11,435.68

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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.