Home / 31,868.92-47,760.31-12,136.71

Finding the Fourth Proportional to 31,868.92, 47,760.31 and 12,136.71

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Solution

The fourth proportional to 31,868.92, 47,760.31 and 12,136.71 is: 18,188.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,868.92 : 47,760.31 = 12,136.71 : x
  2. Step 2: Convert to fraction form
    31,868.92/47,760.31 = 12,136.71/x
  3. Step 3: Cross multiply
    31,868.92x = 47,760.31 × 12,136.71
  4. Step 4: Simplify right side
    31,868.92x = 579,653,031.98
  5. Step 5: Solve for x
    x = 579,653,031.98/31,868.92
  6. Step 6: Final answer
    x = 18,188.66

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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.