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Finding the Fourth Proportional to 18,700.82, 28,028.92 and 8,692.05

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Solution

The fourth proportional to 18,700.82, 28,028.92 and 8,692.05 is: 13,027.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.82 : 28,028.92 = 8,692.05 : x
  2. Step 2: Convert to fraction form
    18,700.82/28,028.92 = 8,692.05/x
  3. Step 3: Cross multiply
    18,700.82x = 28,028.92 × 8,692.05
  4. Step 4: Simplify right side
    18,700.82x = 243,628,713.35
  5. Step 5: Solve for x
    x = 243,628,713.35/18,700.82
  6. Step 6: Final answer
    x = 13,027.70

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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.