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Finding the Fourth Proportional to 13,761.82, 18,990.91 and 7,794.01

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Solution

The fourth proportional to 13,761.82, 18,990.91 and 7,794.01 is: 10,755.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.82 : 18,990.91 = 7,794.01 : x
  2. Step 2: Convert to fraction form
    13,761.82/18,990.91 = 7,794.01/x
  3. Step 3: Cross multiply
    13,761.82x = 18,990.91 × 7,794.01
  4. Step 4: Simplify right side
    13,761.82x = 148,015,304.71
  5. Step 5: Solve for x
    x = 148,015,304.71/13,761.82
  6. Step 6: Final answer
    x = 10,755.51

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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.