Home / 43,286.40-64,931.22-12,120.84

Finding the Fourth Proportional to 43,286.40, 64,931.22 and 12,120.84

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Solution

The fourth proportional to 43,286.40, 64,931.22 and 12,120.84 is: 18,181.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,286.40 : 64,931.22 = 12,120.84 : x
  2. Step 2: Convert to fraction form
    43,286.40/64,931.22 = 12,120.84/x
  3. Step 3: Cross multiply
    43,286.40x = 64,931.22 × 12,120.84
  4. Step 4: Simplify right side
    43,286.40x = 787,020,928.62
  5. Step 5: Solve for x
    x = 787,020,928.62/43,286.40
  6. Step 6: Final answer
    x = 18,181.71

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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.