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Finding the Fourth Proportional to 31,039.92, 42,836.04 and 16,891.92

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Solution

The fourth proportional to 31,039.92, 42,836.04 and 16,891.92 is: 23,311.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,039.92 : 42,836.04 = 16,891.92 : x
  2. Step 2: Convert to fraction form
    31,039.92/42,836.04 = 16,891.92/x
  3. Step 3: Cross multiply
    31,039.92x = 42,836.04 × 16,891.92
  4. Step 4: Simplify right side
    31,039.92x = 723,582,960.80
  5. Step 5: Solve for x
    x = 723,582,960.80/31,039.92
  6. Step 6: Final answer
    x = 23,311.37

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1.5x scale

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.