Home / 7,919.12-11,881.20-4,221.20

Finding the Fourth Proportional to 7,919.12, 11,881.20 and 4,221.20

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Solution

The fourth proportional to 7,919.12, 11,881.20 and 4,221.20 is: 6,333.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.12 : 11,881.20 = 4,221.20 : x
  2. Step 2: Convert to fraction form
    7,919.12/11,881.20 = 4,221.20/x
  3. Step 3: Cross multiply
    7,919.12x = 11,881.20 × 4,221.20
  4. Step 4: Simplify right side
    7,919.12x = 50,152,921.44
  5. Step 5: Solve for x
    x = 50,152,921.44/7,919.12
  6. Step 6: Final answer
    x = 6,333.14

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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.