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Finding the Fourth Proportional to 8,590.81, 12,882.19 and 3,328.34

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Solution

The fourth proportional to 8,590.81, 12,882.19 and 3,328.34 is: 4,990.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.81 : 12,882.19 = 3,328.34 : x
  2. Step 2: Convert to fraction form
    8,590.81/12,882.19 = 3,328.34/x
  3. Step 3: Cross multiply
    8,590.81x = 12,882.19 × 3,328.34
  4. Step 4: Simplify right side
    8,590.81x = 42,876,314.24
  5. Step 5: Solve for x
    x = 42,876,314.24/8,590.81
  6. Step 6: Final answer
    x = 4,990.95

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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.