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Finding the Fourth Proportional to 8,791.60, 12,138.07 and 7,845.77

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Solution

The fourth proportional to 8,791.60, 12,138.07 and 7,845.77 is: 10,832.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.60 : 12,138.07 = 7,845.77 : x
  2. Step 2: Convert to fraction form
    8,791.60/12,138.07 = 7,845.77/x
  3. Step 3: Cross multiply
    8,791.60x = 12,138.07 × 7,845.77
  4. Step 4: Simplify right side
    8,791.60x = 95,232,505.46
  5. Step 5: Solve for x
    x = 95,232,505.46/8,791.60
  6. Step 6: Final answer
    x = 10,832.22

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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.