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Finding the Fourth Proportional to 12,850.71, 17,728.98 and 8,068.64

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Solution

The fourth proportional to 12,850.71, 17,728.98 and 8,068.64 is: 11,131.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,850.71 : 17,728.98 = 8,068.64 : x
  2. Step 2: Convert to fraction form
    12,850.71/17,728.98 = 8,068.64/x
  3. Step 3: Cross multiply
    12,850.71x = 17,728.98 × 8,068.64
  4. Step 4: Simplify right side
    12,850.71x = 143,048,668.54
  5. Step 5: Solve for x
    x = 143,048,668.54/12,850.71
  6. Step 6: Final answer
    x = 11,131.58

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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.