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Finding the Fourth Proportional to 7,791.18, 11,671.62 and 6,918.54

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Solution

The fourth proportional to 7,791.18, 11,671.62 and 6,918.54 is: 10,364.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,791.18 : 11,671.62 = 6,918.54 : x
  2. Step 2: Convert to fraction form
    7,791.18/11,671.62 = 6,918.54/x
  3. Step 3: Cross multiply
    7,791.18x = 11,671.62 × 6,918.54
  4. Step 4: Simplify right side
    7,791.18x = 80,750,569.83
  5. Step 5: Solve for x
    x = 80,750,569.83/7,791.18
  6. Step 6: Final answer
    x = 10,364.36

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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.