Home / 31,849.36-47,755.44-12,129.28

Finding the Fourth Proportional to 31,849.36, 47,755.44 and 12,129.28

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Solution

The fourth proportional to 31,849.36, 47,755.44 and 12,129.28 is: 18,186.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,849.36 : 47,755.44 = 12,129.28 : x
  2. Step 2: Convert to fraction form
    31,849.36/47,755.44 = 12,129.28/x
  3. Step 3: Cross multiply
    31,849.36x = 47,755.44 × 12,129.28
  4. Step 4: Simplify right side
    31,849.36x = 579,239,103.28
  5. Step 5: Solve for x
    x = 579,239,103.28/31,849.36
  6. Step 6: Final answer
    x = 18,186.84

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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.