Home / 18,721.26-28,079.19-5,571.72

Finding the Fourth Proportional to 18,721.26, 28,079.19 and 5,571.72

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Solution

The fourth proportional to 18,721.26, 28,079.19 and 5,571.72 is: 8,356.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.26 : 28,079.19 = 5,571.72 : x
  2. Step 2: Convert to fraction form
    18,721.26/28,079.19 = 5,571.72/x
  3. Step 3: Cross multiply
    18,721.26x = 28,079.19 × 5,571.72
  4. Step 4: Simplify right side
    18,721.26x = 156,449,384.51
  5. Step 5: Solve for x
    x = 156,449,384.51/18,721.26
  6. Step 6: Final answer
    x = 8,356.78

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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.