Home / 12,139.62-18,213.82-4,243.30

Finding the Fourth Proportional to 12,139.62, 18,213.82 and 4,243.30

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Solution

The fourth proportional to 12,139.62, 18,213.82 and 4,243.30 is: 6,366.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.62 : 18,213.82 = 4,243.30 : x
  2. Step 2: Convert to fraction form
    12,139.62/18,213.82 = 4,243.30/x
  3. Step 3: Cross multiply
    12,139.62x = 18,213.82 × 4,243.30
  4. Step 4: Simplify right side
    12,139.62x = 77,286,702.41
  5. Step 5: Solve for x
    x = 77,286,702.41/12,139.62
  6. Step 6: Final answer
    x = 6,366.48

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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.