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Finding the Fourth Proportional to 12,155.86, 16,775.06 and 6,850.70

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Solution

The fourth proportional to 12,155.86, 16,775.06 and 6,850.70 is: 9,453.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.86 : 16,775.06 = 6,850.70 : x
  2. Step 2: Convert to fraction form
    12,155.86/16,775.06 = 6,850.70/x
  3. Step 3: Cross multiply
    12,155.86x = 16,775.06 × 6,850.70
  4. Step 4: Simplify right side
    12,155.86x = 114,920,903.54
  5. Step 5: Solve for x
    x = 114,920,903.54/12,155.86
  6. Step 6: Final answer
    x = 9,453.95

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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.