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Finding the Fourth Proportional to 10,879.75, 15,014.15 and 5,911.75

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Solution

The fourth proportional to 10,879.75, 15,014.15 and 5,911.75 is: 8,158.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.75 : 15,014.15 = 5,911.75 : x
  2. Step 2: Convert to fraction form
    10,879.75/15,014.15 = 5,911.75/x
  3. Step 3: Cross multiply
    10,879.75x = 15,014.15 × 5,911.75
  4. Step 4: Simplify right side
    10,879.75x = 88,759,901.26
  5. Step 5: Solve for x
    x = 88,759,901.26/10,879.75
  6. Step 6: Final answer
    x = 8,158.27

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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.