Home / 20,753.82-28,644.54-12,688.85

Finding the Fourth Proportional to 20,753.82, 28,644.54 and 12,688.85

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Solution

The fourth proportional to 20,753.82, 28,644.54 and 12,688.85 is: 17,513.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.82 : 28,644.54 = 12,688.85 : x
  2. Step 2: Convert to fraction form
    20,753.82/28,644.54 = 12,688.85/x
  3. Step 3: Cross multiply
    20,753.82x = 28,644.54 × 12,688.85
  4. Step 4: Simplify right side
    20,753.82x = 363,466,295.41
  5. Step 5: Solve for x
    x = 363,466,295.41/20,753.82
  6. Step 6: Final answer
    x = 17,513.22

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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.