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Finding the Fourth Proportional to 18,987.62, 28,473.22 and 6,508.86

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Solution

The fourth proportional to 18,987.62, 28,473.22 and 6,508.86 is: 9,760.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.62 : 28,473.22 = 6,508.86 : x
  2. Step 2: Convert to fraction form
    18,987.62/28,473.22 = 6,508.86/x
  3. Step 3: Cross multiply
    18,987.62x = 28,473.22 × 6,508.86
  4. Step 4: Simplify right side
    18,987.62x = 185,328,104.09
  5. Step 5: Solve for x
    x = 185,328,104.09/18,987.62
  6. Step 6: Final answer
    x = 9,760.47

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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.