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Finding the Fourth Proportional to 9,179.85, 12,668.18 and 5,453.85

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Solution

The fourth proportional to 9,179.85, 12,668.18 and 5,453.85 is: 7,526.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,179.85 : 12,668.18 = 5,453.85 : x
  2. Step 2: Convert to fraction form
    9,179.85/12,668.18 = 5,453.85/x
  3. Step 3: Cross multiply
    9,179.85x = 12,668.18 × 5,453.85
  4. Step 4: Simplify right side
    9,179.85x = 69,090,353.49
  5. Step 5: Solve for x
    x = 69,090,353.49/9,179.85
  6. Step 6: Final answer
    x = 7,526.31

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Double scale
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Similar ratio
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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.