Home / 12,212.08-18,318.20-4,421.20

Finding the Fourth Proportional to 12,212.08, 18,318.20 and 4,421.20

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Solution

The fourth proportional to 12,212.08, 18,318.20 and 4,421.20 is: 6,631.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,212.08 : 18,318.20 = 4,421.20 : x
  2. Step 2: Convert to fraction form
    12,212.08/18,318.20 = 4,421.20/x
  3. Step 3: Cross multiply
    12,212.08x = 18,318.20 × 4,421.20
  4. Step 4: Simplify right side
    12,212.08x = 80,988,425.84
  5. Step 5: Solve for x
    x = 80,988,425.84/12,212.08
  6. Step 6: Final answer
    x = 6,631.83

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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.