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Finding the Fourth Proportional to 20,679.58, 28,537.86 and 11,248.12

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Solution

The fourth proportional to 20,679.58, 28,537.86 and 11,248.12 is: 15,522.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.58 : 28,537.86 = 11,248.12 : x
  2. Step 2: Convert to fraction form
    20,679.58/28,537.86 = 11,248.12/x
  3. Step 3: Cross multiply
    20,679.58x = 28,537.86 × 11,248.12
  4. Step 4: Simplify right side
    20,679.58x = 320,997,273.82
  5. Step 5: Solve for x
    x = 320,997,273.82/20,679.58
  6. Step 6: Final answer
    x = 15,522.43

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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.