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Finding the Fourth Proportional to 30,939.67, 42,696.66 and 16,792.57

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Solution

The fourth proportional to 30,939.67, 42,696.66 and 16,792.57 is: 23,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,939.67 : 42,696.66 = 16,792.57 : x
  2. Step 2: Convert to fraction form
    30,939.67/42,696.66 = 16,792.57/x
  3. Step 3: Cross multiply
    30,939.67x = 42,696.66 × 16,792.57
  4. Step 4: Simplify right side
    30,939.67x = 716,986,651.82
  5. Step 5: Solve for x
    x = 716,986,651.82/30,939.67
  6. Step 6: Final answer
    x = 23,173.70

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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.