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Finding the Fourth Proportional to 18,996.90, 28,496.58 and 7,310.12

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Solution

The fourth proportional to 18,996.90, 28,496.58 and 7,310.12 is: 10,965.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,996.90 : 28,496.58 = 7,310.12 : x
  2. Step 2: Convert to fraction form
    18,996.90/28,496.58 = 7,310.12/x
  3. Step 3: Cross multiply
    18,996.90x = 28,496.58 × 7,310.12
  4. Step 4: Simplify right side
    18,996.90x = 208,313,249.49
  5. Step 5: Solve for x
    x = 208,313,249.49/18,996.90
  6. Step 6: Final answer
    x = 10,965.65

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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.