Home / 39,180.72-58,749-12,878.40

Finding the Fourth Proportional to 39,180.72, 58,749 and 12,878.40

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Solution

The fourth proportional to 39,180.72, 58,749 and 12,878.40 is: 19,310.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,180.72 : 58,749 = 12,878.40 : x
  2. Step 2: Convert to fraction form
    39,180.72/58,749 = 12,878.40/x
  3. Step 3: Cross multiply
    39,180.72x = 58,749 × 12,878.40
  4. Step 4: Simplify right side
    39,180.72x = 756,593,121.60
  5. Step 5: Solve for x
    x = 756,593,121.60/39,180.72
  6. Step 6: Final answer
    x = 19,310.34

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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.