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Finding the Fourth Proportional to 13,761.88, 18,991.65 and 7,793.53

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Solution

The fourth proportional to 13,761.88, 18,991.65 and 7,793.53 is: 10,755.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.88 : 18,991.65 = 7,793.53 : x
  2. Step 2: Convert to fraction form
    13,761.88/18,991.65 = 7,793.53/x
  3. Step 3: Cross multiply
    13,761.88x = 18,991.65 × 7,793.53
  4. Step 4: Simplify right side
    13,761.88x = 148,011,994.02
  5. Step 5: Solve for x
    x = 148,011,994.02/13,761.88
  6. Step 6: Final answer
    x = 10,755.22

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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.