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Finding the Fourth Proportional to 12,791.70, 19,151.10 and 11,333.70

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Solution

The fourth proportional to 12,791.70, 19,151.10 and 11,333.70 is: 16,968.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791.70 : 19,151.10 = 11,333.70 : x
  2. Step 2: Convert to fraction form
    12,791.70/19,151.10 = 11,333.70/x
  3. Step 3: Cross multiply
    12,791.70x = 19,151.10 × 11,333.70
  4. Step 4: Simplify right side
    12,791.70x = 217,052,822.07
  5. Step 5: Solve for x
    x = 217,052,822.07/12,791.70
  6. Step 6: Final answer
    x = 16,968.25

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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.