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Finding the Fourth Proportional to 20,536, 28,339.76 and 11,104.64

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Solution

The fourth proportional to 20,536, 28,339.76 and 11,104.64 is: 15,324.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,536 : 28,339.76 = 11,104.64 : x
  2. Step 2: Convert to fraction form
    20,536/28,339.76 = 11,104.64/x
  3. Step 3: Cross multiply
    20,536x = 28,339.76 × 11,104.64
  4. Step 4: Simplify right side
    20,536x = 314,702,832.49
  5. Step 5: Solve for x
    x = 314,702,832.49/20,536
  6. Step 6: Final answer
    x = 15,324.45

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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.