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Finding the Fourth Proportional to 20,322.77, 28,046.79 and 11,369.77

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Solution

The fourth proportional to 20,322.77, 28,046.79 and 11,369.77 is: 15,691.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,322.77 : 28,046.79 = 11,369.77 : x
  2. Step 2: Convert to fraction form
    20,322.77/28,046.79 = 11,369.77/x
  3. Step 3: Cross multiply
    20,322.77x = 28,046.79 × 11,369.77
  4. Step 4: Simplify right side
    20,322.77x = 318,885,481.42
  5. Step 5: Solve for x
    x = 318,885,481.42/20,322.77
  6. Step 6: Final answer
    x = 15,691.05

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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.