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Finding the Fourth Proportional to 28,535.92, 42,808.49 and 8,809.87

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Solution

The fourth proportional to 28,535.92, 42,808.49 and 8,809.87 is: 13,216.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,535.92 : 42,808.49 = 8,809.87 : x
  2. Step 2: Convert to fraction form
    28,535.92/42,808.49 = 8,809.87/x
  3. Step 3: Cross multiply
    28,535.92x = 42,808.49 × 8,809.87
  4. Step 4: Simplify right side
    28,535.92x = 377,137,231.80
  5. Step 5: Solve for x
    x = 377,137,231.80/28,535.92
  6. Step 6: Final answer
    x = 13,216.23

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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.