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Finding the Fourth Proportional to 31,387.31, 43,314.80 and 17,240.16

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Solution

The fourth proportional to 31,387.31, 43,314.80 and 17,240.16 is: 23,791.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,387.31 : 43,314.80 = 17,240.16 : x
  2. Step 2: Convert to fraction form
    31,387.31/43,314.80 = 17,240.16/x
  3. Step 3: Cross multiply
    31,387.31x = 43,314.80 × 17,240.16
  4. Step 4: Simplify right side
    31,387.31x = 746,754,011.93
  5. Step 5: Solve for x
    x = 746,754,011.93/31,387.31
  6. Step 6: Final answer
    x = 23,791.59

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.