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Finding the Fourth Proportional to 18,519, 25,544.22 and 12,479.64

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Solution

The fourth proportional to 18,519, 25,544.22 and 12,479.64 is: 17,213.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,519 : 25,544.22 = 12,479.64 : x
  2. Step 2: Convert to fraction form
    18,519/25,544.22 = 12,479.64/x
  3. Step 3: Cross multiply
    18,519x = 25,544.22 × 12,479.64
  4. Step 4: Simplify right side
    18,519x = 318,782,669.68
  5. Step 5: Solve for x
    x = 318,782,669.68/18,519
  6. Step 6: Final answer
    x = 17,213.82

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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.