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Finding the Fourth Proportional to 8,499.80, 12,735.84 and 5,205.98

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Solution

The fourth proportional to 8,499.80, 12,735.84 and 5,205.98 is: 7,800.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,499.80 : 12,735.84 = 5,205.98 : x
  2. Step 2: Convert to fraction form
    8,499.80/12,735.84 = 5,205.98/x
  3. Step 3: Cross multiply
    8,499.80x = 12,735.84 × 5,205.98
  4. Step 4: Simplify right side
    8,499.80x = 66,302,528.32
  5. Step 5: Solve for x
    x = 66,302,528.32/8,499.80
  6. Step 6: Final answer
    x = 7,800.48

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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.