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Finding the Fourth Proportional to 6,917.78, 10,379.10 and 4,317.68

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Solution

The fourth proportional to 6,917.78, 10,379.10 and 4,317.68 is: 6,478.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,917.78 : 10,379.10 = 4,317.68 : x
  2. Step 2: Convert to fraction form
    6,917.78/10,379.10 = 4,317.68/x
  3. Step 3: Cross multiply
    6,917.78x = 10,379.10 × 4,317.68
  4. Step 4: Simplify right side
    6,917.78x = 44,813,632.49
  5. Step 5: Solve for x
    x = 44,813,632.49/6,917.78
  6. Step 6: Final answer
    x = 6,478.04

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1.5x scale

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.