Home / 12,721.20-17,556.30-7,057.71

Finding the Fourth Proportional to 12,721.20, 17,556.30 and 7,057.71

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Solution

The fourth proportional to 12,721.20, 17,556.30 and 7,057.71 is: 9,740.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.20 : 17,556.30 = 7,057.71 : x
  2. Step 2: Convert to fraction form
    12,721.20/17,556.30 = 7,057.71/x
  3. Step 3: Cross multiply
    12,721.20x = 17,556.30 × 7,057.71
  4. Step 4: Simplify right side
    12,721.20x = 123,907,274.07
  5. Step 5: Solve for x
    x = 123,907,274.07/12,721.20
  6. Step 6: Final answer
    x = 9,740.22

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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.