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Finding the Fourth Proportional to 12,399.50, 17,110.44 and 7,020.39

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Solution

The fourth proportional to 12,399.50, 17,110.44 and 7,020.39 is: 9,687.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.50 : 17,110.44 = 7,020.39 : x
  2. Step 2: Convert to fraction form
    12,399.50/17,110.44 = 7,020.39/x
  3. Step 3: Cross multiply
    12,399.50x = 17,110.44 × 7,020.39
  4. Step 4: Simplify right side
    12,399.50x = 120,121,961.87
  5. Step 5: Solve for x
    x = 120,121,961.87/12,399.50
  6. Step 6: Final answer
    x = 9,687.65

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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.