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Finding the Fourth Proportional to 18,784.62, 28,179.56 and 7,692.89

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Solution

The fourth proportional to 18,784.62, 28,179.56 and 7,692.89 is: 11,540.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,784.62 : 28,179.56 = 7,692.89 : x
  2. Step 2: Convert to fraction form
    18,784.62/28,179.56 = 7,692.89/x
  3. Step 3: Cross multiply
    18,784.62x = 28,179.56 × 7,692.89
  4. Step 4: Simplify right side
    18,784.62x = 216,782,075.97
  5. Step 5: Solve for x
    x = 216,782,075.97/18,784.62
  6. Step 6: Final answer
    x = 11,540.40

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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.