Home / 31,121.89-42,949.25-16,975.51

Finding the Fourth Proportional to 31,121.89, 42,949.25 and 16,975.51

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Solution

The fourth proportional to 31,121.89, 42,949.25 and 16,975.51 is: 23,426.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.89 : 42,949.25 = 16,975.51 : x
  2. Step 2: Convert to fraction form
    31,121.89/42,949.25 = 16,975.51/x
  3. Step 3: Cross multiply
    31,121.89x = 42,949.25 × 16,975.51
  4. Step 4: Simplify right side
    31,121.89x = 729,085,422.87
  5. Step 5: Solve for x
    x = 729,085,422.87/31,121.89
  6. Step 6: Final answer
    x = 23,426.77

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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.