Home / 31,847.78-47,772.15-12,127.43

Finding the Fourth Proportional to 31,847.78, 47,772.15 and 12,127.43

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Solution

The fourth proportional to 31,847.78, 47,772.15 and 12,127.43 is: 18,191.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,847.78 : 47,772.15 = 12,127.43 : x
  2. Step 2: Convert to fraction form
    31,847.78/47,772.15 = 12,127.43/x
  3. Step 3: Cross multiply
    31,847.78x = 47,772.15 × 12,127.43
  4. Step 4: Simplify right side
    31,847.78x = 579,353,405.07
  5. Step 5: Solve for x
    x = 579,353,405.07/31,847.78
  6. Step 6: Final answer
    x = 18,191.33

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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.