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Finding the Fourth Proportional to 8,692.88, 13,028.13 and 3,945.57

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Solution

The fourth proportional to 8,692.88, 13,028.13 and 3,945.57 is: 5,913.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,692.88 : 13,028.13 = 3,945.57 : x
  2. Step 2: Convert to fraction form
    8,692.88/13,028.13 = 3,945.57/x
  3. Step 3: Cross multiply
    8,692.88x = 13,028.13 × 3,945.57
  4. Step 4: Simplify right side
    8,692.88x = 51,403,343.61
  5. Step 5: Solve for x
    x = 51,403,343.61/8,692.88
  6. Step 6: Final answer
    x = 5,913.27

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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.