Home / 20,513.56-28,311.42-11,563

Finding the Fourth Proportional to 20,513.56, 28,311.42 and 11,563

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Solution

The fourth proportional to 20,513.56, 28,311.42 and 11,563 is: 15,958.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.56 : 28,311.42 = 11,563 : x
  2. Step 2: Convert to fraction form
    20,513.56/28,311.42 = 11,563/x
  3. Step 3: Cross multiply
    20,513.56x = 28,311.42 × 11,563
  4. Step 4: Simplify right side
    20,513.56x = 327,364,949.46
  5. Step 5: Solve for x
    x = 327,364,949.46/20,513.56
  6. Step 6: Final answer
    x = 15,958.47

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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.