Home / 31,850.89-47,782.07-13,120.70

Finding the Fourth Proportional to 31,850.89, 47,782.07 and 13,120.70

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Solution

The fourth proportional to 31,850.89, 47,782.07 and 13,120.70 is: 19,683.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,850.89 : 47,782.07 = 13,120.70 : x
  2. Step 2: Convert to fraction form
    31,850.89/47,782.07 = 13,120.70/x
  3. Step 3: Cross multiply
    31,850.89x = 47,782.07 × 13,120.70
  4. Step 4: Simplify right side
    31,850.89x = 626,934,205.85
  5. Step 5: Solve for x
    x = 626,934,205.85/31,850.89
  6. Step 6: Final answer
    x = 19,683.41

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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.