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Finding the Fourth Proportional to 18,819.78, 28,228.21 and 6,967.99

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Solution

The fourth proportional to 18,819.78, 28,228.21 and 6,967.99 is: 10,451.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.78 : 28,228.21 = 6,967.99 : x
  2. Step 2: Convert to fraction form
    18,819.78/28,228.21 = 6,967.99/x
  3. Step 3: Cross multiply
    18,819.78x = 28,228.21 × 6,967.99
  4. Step 4: Simplify right side
    18,819.78x = 196,693,885.00
  5. Step 5: Solve for x
    x = 196,693,885.00/18,819.78
  6. Step 6: Final answer
    x = 10,451.44

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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.