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Finding the Fourth Proportional to 9,920.88, 13,692.24 and 5,942.16

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Solution

The fourth proportional to 9,920.88, 13,692.24 and 5,942.16 is: 8,201.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,920.88 : 13,692.24 = 5,942.16 : x
  2. Step 2: Convert to fraction form
    9,920.88/13,692.24 = 5,942.16/x
  3. Step 3: Cross multiply
    9,920.88x = 13,692.24 × 5,942.16
  4. Step 4: Simplify right side
    9,920.88x = 81,361,480.84
  5. Step 5: Solve for x
    x = 81,361,480.84/9,920.88
  6. Step 6: Final answer
    x = 8,201.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.