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Finding the Fourth Proportional to 3,980.93, 5,529.68 and 3,917.36

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Solution

The fourth proportional to 3,980.93, 5,529.68 and 3,917.36 is: 5,441.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.93 : 5,529.68 = 3,917.36 : x
  2. Step 2: Convert to fraction form
    3,980.93/5,529.68 = 3,917.36/x
  3. Step 3: Cross multiply
    3,980.93x = 5,529.68 × 3,917.36
  4. Step 4: Simplify right side
    3,980.93x = 21,661,700.01
  5. Step 5: Solve for x
    x = 21,661,700.01/3,980.93
  6. Step 6: Final answer
    x = 5,441.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.