Home / 20,755.62-28,642.61-11,803.12

Finding the Fourth Proportional to 20,755.62, 28,642.61 and 11,803.12

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Solution

The fourth proportional to 20,755.62, 28,642.61 and 11,803.12 is: 16,288.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.62 : 28,642.61 = 11,803.12 : x
  2. Step 2: Convert to fraction form
    20,755.62/28,642.61 = 11,803.12/x
  3. Step 3: Cross multiply
    20,755.62x = 28,642.61 × 11,803.12
  4. Step 4: Simplify right side
    20,755.62x = 338,072,162.94
  5. Step 5: Solve for x
    x = 338,072,162.94/20,755.62
  6. Step 6: Final answer
    x = 16,288.22

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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.