Home / 31,864.21-47,768.37-12,129.64

Finding the Fourth Proportional to 31,864.21, 47,768.37 and 12,129.64

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Solution

The fourth proportional to 31,864.21, 47,768.37 and 12,129.64 is: 18,183.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,864.21 : 47,768.37 = 12,129.64 : x
  2. Step 2: Convert to fraction form
    31,864.21/47,768.37 = 12,129.64/x
  3. Step 3: Cross multiply
    31,864.21x = 47,768.37 × 12,129.64
  4. Step 4: Simplify right side
    31,864.21x = 579,413,131.49
  5. Step 5: Solve for x
    x = 579,413,131.49/31,864.21
  6. Step 6: Final answer
    x = 18,183.82

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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.