Home / 20,771.10-28,663.04-11,818.42

Finding the Fourth Proportional to 20,771.10, 28,663.04 and 11,818.42

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Solution

The fourth proportional to 20,771.10, 28,663.04 and 11,818.42 is: 16,308.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.10 : 28,663.04 = 11,818.42 : x
  2. Step 2: Convert to fraction form
    20,771.10/28,663.04 = 11,818.42/x
  3. Step 3: Cross multiply
    20,771.10x = 28,663.04 × 11,818.42
  4. Step 4: Simplify right side
    20,771.10x = 338,751,845.20
  5. Step 5: Solve for x
    x = 338,751,845.20/20,771.10
  6. Step 6: Final answer
    x = 16,308.81

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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.