Home / 12,660.81-18,991.36-3,895.70

Finding the Fourth Proportional to 12,660.81, 18,991.36 and 3,895.70

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Solution

The fourth proportional to 12,660.81, 18,991.36 and 3,895.70 is: 5,843.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.81 : 18,991.36 = 3,895.70 : x
  2. Step 2: Convert to fraction form
    12,660.81/18,991.36 = 3,895.70/x
  3. Step 3: Cross multiply
    12,660.81x = 18,991.36 × 3,895.70
  4. Step 4: Simplify right side
    12,660.81x = 73,984,551.06
  5. Step 5: Solve for x
    x = 73,984,551.06/12,660.81
  6. Step 6: Final answer
    x = 5,843.59

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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.