Home / 31,913.78-47,869.97-8,540.21

Finding the Fourth Proportional to 31,913.78, 47,869.97 and 8,540.21

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Solution

The fourth proportional to 31,913.78, 47,869.97 and 8,540.21 is: 12,810.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,913.78 : 47,869.97 = 8,540.21 : x
  2. Step 2: Convert to fraction form
    31,913.78/47,869.97 = 8,540.21/x
  3. Step 3: Cross multiply
    31,913.78x = 47,869.97 × 8,540.21
  4. Step 4: Simplify right side
    31,913.78x = 408,819,673.47
  5. Step 5: Solve for x
    x = 408,819,673.47/31,913.78
  6. Step 6: Final answer
    x = 12,810.13

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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.