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Finding the Fourth Proportional to 18,493.40, 27,743.70 and 7,963.40

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Solution

The fourth proportional to 18,493.40, 27,743.70 and 7,963.40 is: 11,946.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,493.40 : 27,743.70 = 7,963.40 : x
  2. Step 2: Convert to fraction form
    18,493.40/27,743.70 = 7,963.40/x
  3. Step 3: Cross multiply
    18,493.40x = 27,743.70 × 7,963.40
  4. Step 4: Simplify right side
    18,493.40x = 220,934,180.58
  5. Step 5: Solve for x
    x = 220,934,180.58/18,493.40
  6. Step 6: Final answer
    x = 11,946.65

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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.