Home / 12,721.81-19,085.97-3,956.80

Finding the Fourth Proportional to 12,721.81, 19,085.97 and 3,956.80

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Solution

The fourth proportional to 12,721.81, 19,085.97 and 3,956.80 is: 5,936.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.81 : 19,085.97 = 3,956.80 : x
  2. Step 2: Convert to fraction form
    12,721.81/19,085.97 = 3,956.80/x
  3. Step 3: Cross multiply
    12,721.81x = 19,085.97 × 3,956.80
  4. Step 4: Simplify right side
    12,721.81x = 75,519,366.10
  5. Step 5: Solve for x
    x = 75,519,366.10/12,721.81
  6. Step 6: Final answer
    x = 5,936.21

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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.