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Finding the Fourth Proportional to 7,187.56, 10,781.66 and 1,993.32

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Solution

The fourth proportional to 7,187.56, 10,781.66 and 1,993.32 is: 2,990.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.56 : 10,781.66 = 1,993.32 : x
  2. Step 2: Convert to fraction form
    7,187.56/10,781.66 = 1,993.32/x
  3. Step 3: Cross multiply
    7,187.56x = 10,781.66 × 1,993.32
  4. Step 4: Simplify right side
    7,187.56x = 21,491,298.51
  5. Step 5: Solve for x
    x = 21,491,298.51/7,187.56
  6. Step 6: Final answer
    x = 2,990.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.