Home / 13,181.42-18,190.31-7,131.65

Finding the Fourth Proportional to 13,181.42, 18,190.31 and 7,131.65

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Solution

The fourth proportional to 13,181.42, 18,190.31 and 7,131.65 is: 9,841.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.42 : 18,190.31 = 7,131.65 : x
  2. Step 2: Convert to fraction form
    13,181.42/18,190.31 = 7,131.65/x
  3. Step 3: Cross multiply
    13,181.42x = 18,190.31 × 7,131.65
  4. Step 4: Simplify right side
    13,181.42x = 129,726,837.82
  5. Step 5: Solve for x
    x = 129,726,837.82/13,181.42
  6. Step 6: Final answer
    x = 9,841.64

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Double scale
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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.