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Finding the Fourth Proportional to 20,758.76, 28,646.82 and 11,327.16

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Solution

The fourth proportional to 20,758.76, 28,646.82 and 11,327.16 is: 15,631.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.76 : 28,646.82 = 11,327.16 : x
  2. Step 2: Convert to fraction form
    20,758.76/28,646.82 = 11,327.16/x
  3. Step 3: Cross multiply
    20,758.76x = 28,646.82 × 11,327.16
  4. Step 4: Simplify right side
    20,758.76x = 324,487,113.63
  5. Step 5: Solve for x
    x = 324,487,113.63/20,758.76
  6. Step 6: Final answer
    x = 15,631.33

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.