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Finding the Fourth Proportional to 18,726.93, 28,081.98 and 7,031.88

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Solution

The fourth proportional to 18,726.93, 28,081.98 and 7,031.88 is: 10,544.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.93 : 28,081.98 = 7,031.88 : x
  2. Step 2: Convert to fraction form
    18,726.93/28,081.98 = 7,031.88/x
  3. Step 3: Cross multiply
    18,726.93x = 28,081.98 × 7,031.88
  4. Step 4: Simplify right side
    18,726.93x = 197,469,113.52
  5. Step 5: Solve for x
    x = 197,469,113.52/18,726.93
  6. Step 6: Final answer
    x = 10,544.66

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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.