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Finding the Fourth Proportional to 20,644.88, 28,490.00 and 13,583.97

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Solution

The fourth proportional to 20,644.88, 28,490.00 and 13,583.97 is: 18,745.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.88 : 28,490.00 = 13,583.97 : x
  2. Step 2: Convert to fraction form
    20,644.88/28,490.00 = 13,583.97/x
  3. Step 3: Cross multiply
    20,644.88x = 28,490.00 × 13,583.97
  4. Step 4: Simplify right side
    20,644.88x = 387,007,237.38
  5. Step 5: Solve for x
    x = 387,007,237.38/20,644.88
  6. Step 6: Final answer
    x = 18,745.92

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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.