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Finding the Fourth Proportional to 19,999.80, 27,716.37 and 19,717.92

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Solution

The fourth proportional to 19,999.80, 27,716.37 and 19,717.92 is: 27,325.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,999.80 : 27,716.37 = 19,717.92 : x
  2. Step 2: Convert to fraction form
    19,999.80/27,716.37 = 19,717.92/x
  3. Step 3: Cross multiply
    19,999.80x = 27,716.37 × 19,717.92
  4. Step 4: Simplify right side
    19,999.80x = 546,509,166.35
  5. Step 5: Solve for x
    x = 546,509,166.35/19,999.80
  6. Step 6: Final answer
    x = 27,325.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.