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Finding the Fourth Proportional to 31,716.66, 43,789.16 and 19,797.51

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Solution

The fourth proportional to 31,716.66, 43,789.16 and 19,797.51 is: 27,333.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,716.66 : 43,789.16 = 19,797.51 : x
  2. Step 2: Convert to fraction form
    31,716.66/43,789.16 = 19,797.51/x
  3. Step 3: Cross multiply
    31,716.66x = 43,789.16 × 19,797.51
  4. Step 4: Simplify right side
    31,716.66x = 866,916,234.00
  5. Step 5: Solve for x
    x = 866,916,234.00/31,716.66
  6. Step 6: Final answer
    x = 27,333.15

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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.