Home / 7,991.42-11,972.73-4,289.72

Finding the Fourth Proportional to 7,991.42, 11,972.73 and 4,289.72

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Solution

The fourth proportional to 7,991.42, 11,972.73 and 4,289.72 is: 6,426.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.42 : 11,972.73 = 4,289.72 : x
  2. Step 2: Convert to fraction form
    7,991.42/11,972.73 = 4,289.72/x
  3. Step 3: Cross multiply
    7,991.42x = 11,972.73 × 4,289.72
  4. Step 4: Simplify right side
    7,991.42x = 51,359,659.34
  5. Step 5: Solve for x
    x = 51,359,659.34/7,991.42
  6. Step 6: Final answer
    x = 6,426.85

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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.