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Finding the Fourth Proportional to 31,449.76, 43,395.81 and 18,702.69

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Solution

The fourth proportional to 31,449.76, 43,395.81 and 18,702.69 is: 25,806.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,449.76 : 43,395.81 = 18,702.69 : x
  2. Step 2: Convert to fraction form
    31,449.76/43,395.81 = 18,702.69/x
  3. Step 3: Cross multiply
    31,449.76x = 43,395.81 × 18,702.69
  4. Step 4: Simplify right side
    31,449.76x = 811,618,381.73
  5. Step 5: Solve for x
    x = 811,618,381.73/31,449.76
  6. Step 6: Final answer
    x = 25,806.82

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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.