Home / 21,852.68-30,155.49-12,896.91

Finding the Fourth Proportional to 21,852.68, 30,155.49 and 12,896.91

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Solution

The fourth proportional to 21,852.68, 30,155.49 and 12,896.91 is: 17,797.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,852.68 : 30,155.49 = 12,896.91 : x
  2. Step 2: Convert to fraction form
    21,852.68/30,155.49 = 12,896.91/x
  3. Step 3: Cross multiply
    21,852.68x = 30,155.49 × 12,896.91
  4. Step 4: Simplify right side
    21,852.68x = 388,912,640.54
  5. Step 5: Solve for x
    x = 388,912,640.54/21,852.68
  6. Step 6: Final answer
    x = 17,797.03

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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.