Home / 31,089.94-42,904.11-16,942.78

Finding the Fourth Proportional to 31,089.94, 42,904.11 and 16,942.78

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Solution

The fourth proportional to 31,089.94, 42,904.11 and 16,942.78 is: 23,381.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,089.94 : 42,904.11 = 16,942.78 : x
  2. Step 2: Convert to fraction form
    31,089.94/42,904.11 = 16,942.78/x
  3. Step 3: Cross multiply
    31,089.94x = 42,904.11 × 16,942.78
  4. Step 4: Simplify right side
    31,089.94x = 726,915,013.99
  5. Step 5: Solve for x
    x = 726,915,013.99/31,089.94
  6. Step 6: Final answer
    x = 23,381.04

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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.