Home / 12,212.84-18,305.79-7,991.02

Finding the Fourth Proportional to 12,212.84, 18,305.79 and 7,991.02

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Solution

The fourth proportional to 12,212.84, 18,305.79 and 7,991.02 is: 11,977.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,212.84 : 18,305.79 = 7,991.02 : x
  2. Step 2: Convert to fraction form
    12,212.84/18,305.79 = 7,991.02/x
  3. Step 3: Cross multiply
    12,212.84x = 18,305.79 × 7,991.02
  4. Step 4: Simplify right side
    12,212.84x = 146,281,934.01
  5. Step 5: Solve for x
    x = 146,281,934.01/12,212.84
  6. Step 6: Final answer
    x = 11,977.72

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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.