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Finding the Fourth Proportional to 11,939.14, 16,485.96 and 9,960.07

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Solution

The fourth proportional to 11,939.14, 16,485.96 and 9,960.07 is: 13,753.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,939.14 : 16,485.96 = 9,960.07 : x
  2. Step 2: Convert to fraction form
    11,939.14/16,485.96 = 9,960.07/x
  3. Step 3: Cross multiply
    11,939.14x = 16,485.96 × 9,960.07
  4. Step 4: Simplify right side
    11,939.14x = 164,201,315.62
  5. Step 5: Solve for x
    x = 164,201,315.62/11,939.14
  6. Step 6: Final answer
    x = 13,753.19

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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.