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Finding the Fourth Proportional to 13,791.18, 20,692.84 and 7,222.08

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Solution

The fourth proportional to 13,791.18, 20,692.84 and 7,222.08 is: 10,836.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.18 : 20,692.84 = 7,222.08 : x
  2. Step 2: Convert to fraction form
    13,791.18/20,692.84 = 7,222.08/x
  3. Step 3: Cross multiply
    13,791.18x = 20,692.84 × 7,222.08
  4. Step 4: Simplify right side
    13,791.18x = 149,445,345.91
  5. Step 5: Solve for x
    x = 149,445,345.91/13,791.18
  6. Step 6: Final answer
    x = 10,836.30

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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.