Home / 22,179.47-30,571.20-15,721.27

Finding the Fourth Proportional to 22,179.47, 30,571.20 and 15,721.27

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Solution

The fourth proportional to 22,179.47, 30,571.20 and 15,721.27 is: 21,669.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,179.47 : 30,571.20 = 15,721.27 : x
  2. Step 2: Convert to fraction form
    22,179.47/30,571.20 = 15,721.27/x
  3. Step 3: Cross multiply
    22,179.47x = 30,571.20 × 15,721.27
  4. Step 4: Simplify right side
    22,179.47x = 480,618,013.00
  5. Step 5: Solve for x
    x = 480,618,013.00/22,179.47
  6. Step 6: Final answer
    x = 21,669.50

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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.