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Finding the Fourth Proportional to 31,471.55, 43,431.29 and 17,131.79

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Solution

The fourth proportional to 31,471.55, 43,431.29 and 17,131.79 is: 23,642.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,471.55 : 43,431.29 = 17,131.79 : x
  2. Step 2: Convert to fraction form
    31,471.55/43,431.29 = 17,131.79/x
  3. Step 3: Cross multiply
    31,471.55x = 43,431.29 × 17,131.79
  4. Step 4: Simplify right side
    31,471.55x = 744,055,739.71
  5. Step 5: Solve for x
    x = 744,055,739.71/31,471.55
  6. Step 6: Final answer
    x = 23,642.17

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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.