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Finding the Fourth Proportional to 6,379.89, 8,812.67 and 5,321.11

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Solution

The fourth proportional to 6,379.89, 8,812.67 and 5,321.11 is: 7,350.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,379.89 : 8,812.67 = 5,321.11 : x
  2. Step 2: Convert to fraction form
    6,379.89/8,812.67 = 5,321.11/x
  3. Step 3: Cross multiply
    6,379.89x = 8,812.67 × 5,321.11
  4. Step 4: Simplify right side
    6,379.89x = 46,893,186.46
  5. Step 5: Solve for x
    x = 46,893,186.46/6,379.89
  6. Step 6: Final answer
    x = 7,350.16

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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.