Home / 12,722.66-17,553.21-7,688.78

Finding the Fourth Proportional to 12,722.66, 17,553.21 and 7,688.78

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Solution

The fourth proportional to 12,722.66, 17,553.21 and 7,688.78 is: 10,608.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,722.66 : 17,553.21 = 7,688.78 : x
  2. Step 2: Convert to fraction form
    12,722.66/17,553.21 = 7,688.78/x
  3. Step 3: Cross multiply
    12,722.66x = 17,553.21 × 7,688.78
  4. Step 4: Simplify right side
    12,722.66x = 134,962,769.98
  5. Step 5: Solve for x
    x = 134,962,769.98/12,722.66
  6. Step 6: Final answer
    x = 10,608.06

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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.