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Finding the Fourth Proportional to 7,860.70, 11,791.05 and 2,666.62

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Solution

The fourth proportional to 7,860.70, 11,791.05 and 2,666.62 is: 3,999.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,860.70 : 11,791.05 = 2,666.62 : x
  2. Step 2: Convert to fraction form
    7,860.70/11,791.05 = 2,666.62/x
  3. Step 3: Cross multiply
    7,860.70x = 11,791.05 × 2,666.62
  4. Step 4: Simplify right side
    7,860.70x = 31,442,249.75
  5. Step 5: Solve for x
    x = 31,442,249.75/7,860.70
  6. Step 6: Final answer
    x = 3,999.93

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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.