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Finding the Fourth Proportional to 11,860.71, 17,791.04 and 11,139.00

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Solution

The fourth proportional to 11,860.71, 17,791.04 and 11,139.00 is: 16,708.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,860.71 : 17,791.04 = 11,139.00 : x
  2. Step 2: Convert to fraction form
    11,860.71/17,791.04 = 11,139.00/x
  3. Step 3: Cross multiply
    11,860.71x = 17,791.04 × 11,139.00
  4. Step 4: Simplify right side
    11,860.71x = 198,174,249.91
  5. Step 5: Solve for x
    x = 198,174,249.91/11,860.71
  6. Step 6: Final answer
    x = 16,708.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.