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Finding the Fourth Proportional to 13,910.74, 19,198.19 and 7,943.31

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Solution

The fourth proportional to 13,910.74, 19,198.19 and 7,943.31 is: 10,962.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,910.74 : 19,198.19 = 7,943.31 : x
  2. Step 2: Convert to fraction form
    13,910.74/19,198.19 = 7,943.31/x
  3. Step 3: Cross multiply
    13,910.74x = 19,198.19 × 7,943.31
  4. Step 4: Simplify right side
    13,910.74x = 152,497,194.47
  5. Step 5: Solve for x
    x = 152,497,194.47/13,910.74
  6. Step 6: Final answer
    x = 10,962.55

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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.