Home / 22,417.75-30,936.50-12,991.78

Finding the Fourth Proportional to 22,417.75, 30,936.50 and 12,991.78

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Solution

The fourth proportional to 22,417.75, 30,936.50 and 12,991.78 is: 17,928.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,417.75 : 30,936.50 = 12,991.78 : x
  2. Step 2: Convert to fraction form
    22,417.75/30,936.50 = 12,991.78/x
  3. Step 3: Cross multiply
    22,417.75x = 30,936.50 × 12,991.78
  4. Step 4: Simplify right side
    22,417.75x = 401,920,201.97
  5. Step 5: Solve for x
    x = 401,920,201.97/22,417.75
  6. Step 6: Final answer
    x = 17,928.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.