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Finding the Fourth Proportional to 18,808.04, 28,208.82 and 7,118.12

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Solution

The fourth proportional to 18,808.04, 28,208.82 and 7,118.12 is: 10,675.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.04 : 28,208.82 = 7,118.12 : x
  2. Step 2: Convert to fraction form
    18,808.04/28,208.82 = 7,118.12/x
  3. Step 3: Cross multiply
    18,808.04x = 28,208.82 × 7,118.12
  4. Step 4: Simplify right side
    18,808.04x = 200,793,765.82
  5. Step 5: Solve for x
    x = 200,793,765.82/18,808.04
  6. Step 6: Final answer
    x = 10,675.95

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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.