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Finding the Fourth Proportional to 9,179.87, 12,668.53 and 5,146.87

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Solution

The fourth proportional to 9,179.87, 12,668.53 and 5,146.87 is: 7,102.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,179.87 : 12,668.53 = 5,146.87 : x
  2. Step 2: Convert to fraction form
    9,179.87/12,668.53 = 5,146.87/x
  3. Step 3: Cross multiply
    9,179.87x = 12,668.53 × 5,146.87
  4. Step 4: Simplify right side
    9,179.87x = 65,203,215.76
  5. Step 5: Solve for x
    x = 65,203,215.76/9,179.87
  6. Step 6: Final answer
    x = 7,102.85

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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.