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Finding the Fourth Proportional to 18,519, 25,556.22 and 10,135.50

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Solution

The fourth proportional to 18,519, 25,556.22 and 10,135.50 is: 13,986.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,519 : 25,556.22 = 10,135.50 : x
  2. Step 2: Convert to fraction form
    18,519/25,556.22 = 10,135.50/x
  3. Step 3: Cross multiply
    18,519x = 25,556.22 × 10,135.50
  4. Step 4: Simplify right side
    18,519x = 259,025,067.81
  5. Step 5: Solve for x
    x = 259,025,067.81/18,519
  6. Step 6: Final answer
    x = 13,986.99

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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.