Home / 28,696.80-39,601.20-16,121.28

Finding the Fourth Proportional to 28,696.80, 39,601.20 and 16,121.28

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Solution

The fourth proportional to 28,696.80, 39,601.20 and 16,121.28 is: 22,247.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,696.80 : 39,601.20 = 16,121.28 : x
  2. Step 2: Convert to fraction form
    28,696.80/39,601.20 = 16,121.28/x
  3. Step 3: Cross multiply
    28,696.80x = 39,601.20 × 16,121.28
  4. Step 4: Simplify right side
    28,696.80x = 638,422,033.54
  5. Step 5: Solve for x
    x = 638,422,033.54/28,696.80
  6. Step 6: Final answer
    x = 22,247.15

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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.