Home / 7,113.78-9,816.66-3,969.36

Finding the Fourth Proportional to 7,113.78, 9,816.66 and 3,969.36

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Solution

The fourth proportional to 7,113.78, 9,816.66 and 3,969.36 is: 5,477.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,113.78 : 9,816.66 = 3,969.36 : x
  2. Step 2: Convert to fraction form
    7,113.78/9,816.66 = 3,969.36/x
  3. Step 3: Cross multiply
    7,113.78x = 9,816.66 × 3,969.36
  4. Step 4: Simplify right side
    7,113.78x = 38,965,857.54
  5. Step 5: Solve for x
    x = 38,965,857.54/7,113.78
  6. Step 6: Final answer
    x = 5,477.52

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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.