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Finding the Fourth Proportional to 18,668.91, 27,981.10 and 13,016.01

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Solution

The fourth proportional to 18,668.91, 27,981.10 and 13,016.01 is: 19,508.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.91 : 27,981.10 = 13,016.01 : x
  2. Step 2: Convert to fraction form
    18,668.91/27,981.10 = 13,016.01/x
  3. Step 3: Cross multiply
    18,668.91x = 27,981.10 × 13,016.01
  4. Step 4: Simplify right side
    18,668.91x = 364,202,277.41
  5. Step 5: Solve for x
    x = 364,202,277.41/18,668.91
  6. Step 6: Final answer
    x = 19,508.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.