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Finding the Fourth Proportional to 18,218.01, 27,319.35 and 7,692.78

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Solution

The fourth proportional to 18,218.01, 27,319.35 and 7,692.78 is: 11,535.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,218.01 : 27,319.35 = 7,692.78 : x
  2. Step 2: Convert to fraction form
    18,218.01/27,319.35 = 7,692.78/x
  3. Step 3: Cross multiply
    18,218.01x = 27,319.35 × 7,692.78
  4. Step 4: Simplify right side
    18,218.01x = 210,161,749.29
  5. Step 5: Solve for x
    x = 210,161,749.29/18,218.01
  6. Step 6: Final answer
    x = 11,535.93

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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.