Home / 31,865.76-47,806.32-13,399.20

Finding the Fourth Proportional to 31,865.76, 47,806.32 and 13,399.20

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Solution

The fourth proportional to 31,865.76, 47,806.32 and 13,399.20 is: 20,102.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,865.76 : 47,806.32 = 13,399.20 : x
  2. Step 2: Convert to fraction form
    31,865.76/47,806.32 = 13,399.20/x
  3. Step 3: Cross multiply
    31,865.76x = 47,806.32 × 13,399.20
  4. Step 4: Simplify right side
    31,865.76x = 640,566,442.94
  5. Step 5: Solve for x
    x = 640,566,442.94/31,865.76
  6. Step 6: Final answer
    x = 20,102.03

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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.