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Finding the Fourth Proportional to 18,619.57, 25,694.80 and 13,860.80

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Solution

The fourth proportional to 18,619.57, 25,694.80 and 13,860.80 is: 19,127.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.57 : 25,694.80 = 13,860.80 : x
  2. Step 2: Convert to fraction form
    18,619.57/25,694.80 = 13,860.80/x
  3. Step 3: Cross multiply
    18,619.57x = 25,694.80 × 13,860.80
  4. Step 4: Simplify right side
    18,619.57x = 356,150,393.53
  5. Step 5: Solve for x
    x = 356,150,393.53/18,619.57
  6. Step 6: Final answer
    x = 19,127.74

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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.