Home / 12,722.18-17,556.78-7,685.70

Finding the Fourth Proportional to 12,722.18, 17,556.78 and 7,685.70

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Solution

The fourth proportional to 12,722.18, 17,556.78 and 7,685.70 is: 10,606.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,722.18 : 17,556.78 = 7,685.70 : x
  2. Step 2: Convert to fraction form
    12,722.18/17,556.78 = 7,685.70/x
  3. Step 3: Cross multiply
    12,722.18x = 17,556.78 × 7,685.70
  4. Step 4: Simplify right side
    12,722.18x = 134,936,107.03
  5. Step 5: Solve for x
    x = 134,936,107.03/12,722.18
  6. Step 6: Final answer
    x = 10,606.37

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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.