Home / 20,136.07-27,772.38-13,680.70

Finding the Fourth Proportional to 20,136.07, 27,772.38 and 13,680.70

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Solution

The fourth proportional to 20,136.07, 27,772.38 and 13,680.70 is: 18,868.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.07 : 27,772.38 = 13,680.70 : x
  2. Step 2: Convert to fraction form
    20,136.07/27,772.38 = 13,680.70/x
  3. Step 3: Cross multiply
    20,136.07x = 27,772.38 × 13,680.70
  4. Step 4: Simplify right side
    20,136.07x = 379,945,599.07
  5. Step 5: Solve for x
    x = 379,945,599.07/20,136.07
  6. Step 6: Final answer
    x = 18,868.91

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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.