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Finding the Fourth Proportional to 18,788.87, 28,182.42 and 7,692.81

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Solution

The fourth proportional to 18,788.87, 28,182.42 and 7,692.81 is: 11,538.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.87 : 28,182.42 = 7,692.81 : x
  2. Step 2: Convert to fraction form
    18,788.87/28,182.42 = 7,692.81/x
  3. Step 3: Cross multiply
    18,788.87x = 28,182.42 × 7,692.81
  4. Step 4: Simplify right side
    18,788.87x = 216,802,002.40
  5. Step 5: Solve for x
    x = 216,802,002.40/18,788.87
  6. Step 6: Final answer
    x = 11,538.86

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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.