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Finding the Fourth Proportional to 7,130.69, 10,692.20 and 3,969.12

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Solution

The fourth proportional to 7,130.69, 10,692.20 and 3,969.12 is: 5,951.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.69 : 10,692.20 = 3,969.12 : x
  2. Step 2: Convert to fraction form
    7,130.69/10,692.20 = 3,969.12/x
  3. Step 3: Cross multiply
    7,130.69x = 10,692.20 × 3,969.12
  4. Step 4: Simplify right side
    7,130.69x = 42,438,634.79
  5. Step 5: Solve for x
    x = 42,438,634.79/7,130.69
  6. Step 6: Final answer
    x = 5,951.55

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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.