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Finding the Fourth Proportional to 18,712.69, 28,044.72 and 7,606.45

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Solution

The fourth proportional to 18,712.69, 28,044.72 and 7,606.45 is: 11,399.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.69 : 28,044.72 = 7,606.45 : x
  2. Step 2: Convert to fraction form
    18,712.69/28,044.72 = 7,606.45/x
  3. Step 3: Cross multiply
    18,712.69x = 28,044.72 × 7,606.45
  4. Step 4: Simplify right side
    18,712.69x = 213,320,760.44
  5. Step 5: Solve for x
    x = 213,320,760.44/18,712.69
  6. Step 6: Final answer
    x = 11,399.79

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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.