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Finding the Fourth Proportional to 3,891.96, 5,367.60 and 3,503.16

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Solution

The fourth proportional to 3,891.96, 5,367.60 and 3,503.16 is: 4,831.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.96 : 5,367.60 = 3,503.16 : x
  2. Step 2: Convert to fraction form
    3,891.96/5,367.60 = 3,503.16/x
  3. Step 3: Cross multiply
    3,891.96x = 5,367.60 × 3,503.16
  4. Step 4: Simplify right side
    3,891.96x = 18,803,561.62
  5. Step 5: Solve for x
    x = 18,803,561.62/3,891.96
  6. Step 6: Final answer
    x = 4,831.39

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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.