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Finding the Fourth Proportional to 13,761.05, 18,992.05 and 7,793.89

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Solution

The fourth proportional to 13,761.05, 18,992.05 and 7,793.89 is: 10,756.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.05 : 18,992.05 = 7,793.89 : x
  2. Step 2: Convert to fraction form
    13,761.05/18,992.05 = 7,793.89/x
  3. Step 3: Cross multiply
    13,761.05x = 18,992.05 × 7,793.89
  4. Step 4: Simplify right side
    13,761.05x = 148,021,881.61
  5. Step 5: Solve for x
    x = 148,021,881.61/13,761.05
  6. Step 6: Final answer
    x = 10,756.59

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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.