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Finding the Fourth Proportional to 7,173.87, 9,899.06 and 4,187.54

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Solution

The fourth proportional to 7,173.87, 9,899.06 and 4,187.54 is: 5,778.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,173.87 : 9,899.06 = 4,187.54 : x
  2. Step 2: Convert to fraction form
    7,173.87/9,899.06 = 4,187.54/x
  3. Step 3: Cross multiply
    7,173.87x = 9,899.06 × 4,187.54
  4. Step 4: Simplify right side
    7,173.87x = 41,452,709.71
  5. Step 5: Solve for x
    x = 41,452,709.71/7,173.87
  6. Step 6: Final answer
    x = 5,778.29

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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.