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Finding the Fourth Proportional to 20,796, 28,698.48 and 11,364.57

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Solution

The fourth proportional to 20,796, 28,698.48 and 11,364.57 is: 15,683.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,796 : 28,698.48 = 11,364.57 : x
  2. Step 2: Convert to fraction form
    20,796/28,698.48 = 11,364.57/x
  3. Step 3: Cross multiply
    20,796x = 28,698.48 × 11,364.57
  4. Step 4: Simplify right side
    20,796x = 326,145,884.85
  5. Step 5: Solve for x
    x = 326,145,884.85/20,796
  6. Step 6: Final answer
    x = 15,683.11

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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.