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Finding the Fourth Proportional to 7,190.17, 9,917.77 and 4,636.78

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Solution

The fourth proportional to 7,190.17, 9,917.77 and 4,636.78 is: 6,395.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.17 : 9,917.77 = 4,636.78 : x
  2. Step 2: Convert to fraction form
    7,190.17/9,917.77 = 4,636.78/x
  3. Step 3: Cross multiply
    7,190.17x = 9,917.77 × 4,636.78
  4. Step 4: Simplify right side
    7,190.17x = 45,986,517.58
  5. Step 5: Solve for x
    x = 45,986,517.58/7,190.17
  6. Step 6: Final answer
    x = 6,395.75

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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.