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Finding the Fourth Proportional to 20,561.77, 28,375.02 and 11,609.07

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Solution

The fourth proportional to 20,561.77, 28,375.02 and 11,609.07 is: 16,020.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.77 : 28,375.02 = 11,609.07 : x
  2. Step 2: Convert to fraction form
    20,561.77/28,375.02 = 11,609.07/x
  3. Step 3: Cross multiply
    20,561.77x = 28,375.02 × 11,609.07
  4. Step 4: Simplify right side
    20,561.77x = 329,407,593.43
  5. Step 5: Solve for x
    x = 329,407,593.43/20,561.77
  6. Step 6: Final answer
    x = 16,020.39

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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.