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Finding the Fourth Proportional to 7,679.85, 10,601.16 and 5,169.12

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Solution

The fourth proportional to 7,679.85, 10,601.16 and 5,169.12 is: 7,135.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.85 : 10,601.16 = 5,169.12 : x
  2. Step 2: Convert to fraction form
    7,679.85/10,601.16 = 5,169.12/x
  3. Step 3: Cross multiply
    7,679.85x = 10,601.16 × 5,169.12
  4. Step 4: Simplify right side
    7,679.85x = 54,798,668.18
  5. Step 5: Solve for x
    x = 54,798,668.18/7,679.85
  6. Step 6: Final answer
    x = 7,135.38

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Half scale
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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.