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Finding the Fourth Proportional to 18,668.90, 25,754 and 11,949.14

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Solution

The fourth proportional to 18,668.90, 25,754 and 11,949.14 is: 16,484.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.90 : 25,754 = 11,949.14 : x
  2. Step 2: Convert to fraction form
    18,668.90/25,754 = 11,949.14/x
  3. Step 3: Cross multiply
    18,668.90x = 25,754 × 11,949.14
  4. Step 4: Simplify right side
    18,668.90x = 307,738,151.56
  5. Step 5: Solve for x
    x = 307,738,151.56/18,668.90
  6. Step 6: Final answer
    x = 16,484.00

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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.