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Finding the Fourth Proportional to 7,187.87, 9,919.16 and 4,203.12

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Solution

The fourth proportional to 7,187.87, 9,919.16 and 4,203.12 is: 5,800.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.87 : 9,919.16 = 4,203.12 : x
  2. Step 2: Convert to fraction form
    7,187.87/9,919.16 = 4,203.12/x
  3. Step 3: Cross multiply
    7,187.87x = 9,919.16 × 4,203.12
  4. Step 4: Simplify right side
    7,187.87x = 41,691,451.72
  5. Step 5: Solve for x
    x = 41,691,451.72/7,187.87
  6. Step 6: Final answer
    x = 5,800.25

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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.