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Finding the Fourth Proportional to 28,535.87, 42,809.16 and 8,809.80

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Solution

The fourth proportional to 28,535.87, 42,809.16 and 8,809.80 is: 13,216.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,535.87 : 42,809.16 = 8,809.80 : x
  2. Step 2: Convert to fraction form
    28,535.87/42,809.16 = 8,809.80/x
  3. Step 3: Cross multiply
    28,535.87x = 42,809.16 × 8,809.80
  4. Step 4: Simplify right side
    28,535.87x = 377,140,137.77
  5. Step 5: Solve for x
    x = 377,140,137.77/28,535.87
  6. Step 6: Final answer
    x = 13,216.35

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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.