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Finding the Fourth Proportional to 8,794.21, 12,135.80 and 4,815.49

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Solution

The fourth proportional to 8,794.21, 12,135.80 and 4,815.49 is: 6,645.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,794.21 : 12,135.80 = 4,815.49 : x
  2. Step 2: Convert to fraction form
    8,794.21/12,135.80 = 4,815.49/x
  3. Step 3: Cross multiply
    8,794.21x = 12,135.80 × 4,815.49
  4. Step 4: Simplify right side
    8,794.21x = 58,439,823.54
  5. Step 5: Solve for x
    x = 58,439,823.54/8,794.21
  6. Step 6: Final answer
    x = 6,645.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.