Home / 31,086.60-42,900-16,939.44

Finding the Fourth Proportional to 31,086.60, 42,900 and 16,939.44

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Solution

The fourth proportional to 31,086.60, 42,900 and 16,939.44 is: 23,376.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,086.60 : 42,900 = 16,939.44 : x
  2. Step 2: Convert to fraction form
    31,086.60/42,900 = 16,939.44/x
  3. Step 3: Cross multiply
    31,086.60x = 42,900 × 16,939.44
  4. Step 4: Simplify right side
    31,086.60x = 726,701,976
  5. Step 5: Solve for x
    x = 726,701,976/31,086.60
  6. Step 6: Final answer
    x = 23,376.70

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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.