Home / 12,721.92-17,556.64-7,133.12

Finding the Fourth Proportional to 12,721.92, 17,556.64 and 7,133.12

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Solution

The fourth proportional to 12,721.92, 17,556.64 and 7,133.12 is: 9,843.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.92 : 17,556.64 = 7,133.12 : x
  2. Step 2: Convert to fraction form
    12,721.92/17,556.64 = 7,133.12/x
  3. Step 3: Cross multiply
    12,721.92x = 17,556.64 × 7,133.12
  4. Step 4: Simplify right side
    12,721.92x = 125,233,619.92
  5. Step 5: Solve for x
    x = 125,233,619.92/12,721.92
  6. Step 6: Final answer
    x = 9,843.92

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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.