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Finding the Fourth Proportional to 18,818.78, 28,226.72 and 6,966.99

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Solution

The fourth proportional to 18,818.78, 28,226.72 and 6,966.99 is: 10,449.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.78 : 28,226.72 = 6,966.99 : x
  2. Step 2: Convert to fraction form
    18,818.78/28,226.72 = 6,966.99/x
  3. Step 3: Cross multiply
    18,818.78x = 28,226.72 × 6,966.99
  4. Step 4: Simplify right side
    18,818.78x = 196,655,241.14
  5. Step 5: Solve for x
    x = 196,655,241.14/18,818.78
  6. Step 6: Final answer
    x = 10,449.95

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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.