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Finding the Fourth Proportional to 18,788.10, 28,182.12 and 7,692.84

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Solution

The fourth proportional to 18,788.10, 28,182.12 and 7,692.84 is: 11,539.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.10 : 28,182.12 = 7,692.84 : x
  2. Step 2: Convert to fraction form
    18,788.10/28,182.12 = 7,692.84/x
  3. Step 3: Cross multiply
    18,788.10x = 28,182.12 × 7,692.84
  4. Step 4: Simplify right side
    18,788.10x = 216,800,540.02
  5. Step 5: Solve for x
    x = 216,800,540.02/18,788.10
  6. Step 6: Final answer
    x = 11,539.25

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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.