Home / 11,929.78-17,894.67-4,138.57

Finding the Fourth Proportional to 11,929.78, 17,894.67 and 4,138.57

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Solution

The fourth proportional to 11,929.78, 17,894.67 and 4,138.57 is: 6,207.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,929.78 : 17,894.67 = 4,138.57 : x
  2. Step 2: Convert to fraction form
    11,929.78/17,894.67 = 4,138.57/x
  3. Step 3: Cross multiply
    11,929.78x = 17,894.67 × 4,138.57
  4. Step 4: Simplify right side
    11,929.78x = 74,058,344.42
  5. Step 5: Solve for x
    x = 74,058,344.42/11,929.78
  6. Step 6: Final answer
    x = 6,207.86

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1.5x scale

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.