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Finding the Fourth Proportional to 5,168.99, 7,132.90 and 2,811.11

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Solution

The fourth proportional to 5,168.99, 7,132.90 and 2,811.11 is: 3,879.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,168.99 : 7,132.90 = 2,811.11 : x
  2. Step 2: Convert to fraction form
    5,168.99/7,132.90 = 2,811.11/x
  3. Step 3: Cross multiply
    5,168.99x = 7,132.90 × 2,811.11
  4. Step 4: Simplify right side
    5,168.99x = 20,051,366.52
  5. Step 5: Solve for x
    x = 20,051,366.52/5,168.99
  6. Step 6: Final answer
    x = 3,879.17

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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.