Home / 31,385-43,315.14-18,137

Finding the Fourth Proportional to 31,385, 43,315.14 and 18,137

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Solution

The fourth proportional to 31,385, 43,315.14 and 18,137 is: 25,031.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,385 : 43,315.14 = 18,137 : x
  2. Step 2: Convert to fraction form
    31,385/43,315.14 = 18,137/x
  3. Step 3: Cross multiply
    31,385x = 43,315.14 × 18,137
  4. Step 4: Simplify right side
    31,385x = 785,606,694.18
  5. Step 5: Solve for x
    x = 785,606,694.18/31,385
  6. Step 6: Final answer
    x = 25,031.28

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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.