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Finding the Fourth Proportional to 8,559.99, 12,821.27 and 5,263.09

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Solution

The fourth proportional to 8,559.99, 12,821.27 and 5,263.09 is: 7,883.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,559.99 : 12,821.27 = 5,263.09 : x
  2. Step 2: Convert to fraction form
    8,559.99/12,821.27 = 5,263.09/x
  3. Step 3: Cross multiply
    8,559.99x = 12,821.27 × 5,263.09
  4. Step 4: Simplify right side
    8,559.99x = 67,479,497.92
  5. Step 5: Solve for x
    x = 67,479,497.92/8,559.99
  6. Step 6: Final answer
    x = 7,883.13

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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.