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Finding the Fourth Proportional to 12,617.75, 18,992.42 and 10,715.06

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Solution

The fourth proportional to 12,617.75, 18,992.42 and 10,715.06 is: 16,128.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.75 : 18,992.42 = 10,715.06 : x
  2. Step 2: Convert to fraction form
    12,617.75/18,992.42 = 10,715.06/x
  3. Step 3: Cross multiply
    12,617.75x = 18,992.42 × 10,715.06
  4. Step 4: Simplify right side
    12,617.75x = 203,504,771.31
  5. Step 5: Solve for x
    x = 203,504,771.31/12,617.75
  6. Step 6: Final answer
    x = 16,128.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.