Home / 31,186.24-46,791-18,715.21

Finding the Fourth Proportional to 31,186.24, 46,791 and 18,715.21

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Solution

The fourth proportional to 31,186.24, 46,791 and 18,715.21 is: 28,079.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,186.24 : 46,791 = 18,715.21 : x
  2. Step 2: Convert to fraction form
    31,186.24/46,791 = 18,715.21/x
  3. Step 3: Cross multiply
    31,186.24x = 46,791 × 18,715.21
  4. Step 4: Simplify right side
    31,186.24x = 875,703,391.11
  5. Step 5: Solve for x
    x = 875,703,391.11/31,186.24
  6. Step 6: Final answer
    x = 28,079.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.