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Finding the Fourth Proportional to 28,599.80, 42,907.80 and 8,880.35

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Solution

The fourth proportional to 28,599.80, 42,907.80 and 8,880.35 is: 13,323.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,599.80 : 42,907.80 = 8,880.35 : x
  2. Step 2: Convert to fraction form
    28,599.80/42,907.80 = 8,880.35/x
  3. Step 3: Cross multiply
    28,599.80x = 42,907.80 × 8,880.35
  4. Step 4: Simplify right side
    28,599.80x = 381,036,281.73
  5. Step 5: Solve for x
    x = 381,036,281.73/28,599.80
  6. Step 6: Final answer
    x = 13,323.04

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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.