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Finding the Fourth Proportional to 7,879.75, 10,874.19 and 5,090.11

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Solution

The fourth proportional to 7,879.75, 10,874.19 and 5,090.11 is: 7,024.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.75 : 10,874.19 = 5,090.11 : x
  2. Step 2: Convert to fraction form
    7,879.75/10,874.19 = 5,090.11/x
  3. Step 3: Cross multiply
    7,879.75x = 10,874.19 × 5,090.11
  4. Step 4: Simplify right side
    7,879.75x = 55,350,823.26
  5. Step 5: Solve for x
    x = 55,350,823.26/7,879.75
  6. Step 6: Final answer
    x = 7,024.44

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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.