Home / 21,880.71-30,195.97-13,382.69

Finding the Fourth Proportional to 21,880.71, 30,195.97 and 13,382.69

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Solution

The fourth proportional to 21,880.71, 30,195.97 and 13,382.69 is: 18,468.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,880.71 : 30,195.97 = 13,382.69 : x
  2. Step 2: Convert to fraction form
    21,880.71/30,195.97 = 13,382.69/x
  3. Step 3: Cross multiply
    21,880.71x = 30,195.97 × 13,382.69
  4. Step 4: Simplify right side
    21,880.71x = 404,103,121.32
  5. Step 5: Solve for x
    x = 404,103,121.32/21,880.71
  6. Step 6: Final answer
    x = 18,468.46

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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.