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Finding the Fourth Proportional to 20,396, 28,146.08 and 11,443.44

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Solution

The fourth proportional to 20,396, 28,146.08 and 11,443.44 is: 15,791.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,396 : 28,146.08 = 11,443.44 : x
  2. Step 2: Convert to fraction form
    20,396/28,146.08 = 11,443.44/x
  3. Step 3: Cross multiply
    20,396x = 28,146.08 × 11,443.44
  4. Step 4: Simplify right side
    20,396x = 322,087,977.72
  5. Step 5: Solve for x
    x = 322,087,977.72/20,396
  6. Step 6: Final answer
    x = 15,791.72

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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.