Home / 8,120.61-12,178.44-4,222.89

Finding the Fourth Proportional to 8,120.61, 12,178.44 and 4,222.89

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Solution

The fourth proportional to 8,120.61, 12,178.44 and 4,222.89 is: 6,333.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.61 : 12,178.44 = 4,222.89 : x
  2. Step 2: Convert to fraction form
    8,120.61/12,178.44 = 4,222.89/x
  3. Step 3: Cross multiply
    8,120.61x = 12,178.44 × 4,222.89
  4. Step 4: Simplify right side
    8,120.61x = 51,428,212.49
  5. Step 5: Solve for x
    x = 51,428,212.49/8,120.61
  6. Step 6: Final answer
    x = 6,333.05

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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.