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Finding the Fourth Proportional to 18,668.82, 28,002.30 and 6,981.18

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Solution

The fourth proportional to 18,668.82, 28,002.30 and 6,981.18 is: 10,471.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.82 : 28,002.30 = 6,981.18 : x
  2. Step 2: Convert to fraction form
    18,668.82/28,002.30 = 6,981.18/x
  3. Step 3: Cross multiply
    18,668.82x = 28,002.30 × 6,981.18
  4. Step 4: Simplify right side
    18,668.82x = 195,489,096.71
  5. Step 5: Solve for x
    x = 195,489,096.71/18,668.82
  6. Step 6: Final answer
    x = 10,471.42

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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.