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Finding the Fourth Proportional to 8,355.99, 12,535.43 and 2,809.87

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Solution

The fourth proportional to 8,355.99, 12,535.43 and 2,809.87 is: 4,215.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,355.99 : 12,535.43 = 2,809.87 : x
  2. Step 2: Convert to fraction form
    8,355.99/12,535.43 = 2,809.87/x
  3. Step 3: Cross multiply
    8,355.99x = 12,535.43 × 2,809.87
  4. Step 4: Simplify right side
    8,355.99x = 35,222,928.69
  5. Step 5: Solve for x
    x = 35,222,928.69/8,355.99
  6. Step 6: Final answer
    x = 4,215.29

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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.