Home / 13,131.05-18,121.01-7,162.65

Finding the Fourth Proportional to 13,131.05, 18,121.01 and 7,162.65

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Solution

The fourth proportional to 13,131.05, 18,121.01 and 7,162.65 is: 9,884.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.05 : 18,121.01 = 7,162.65 : x
  2. Step 2: Convert to fraction form
    13,131.05/18,121.01 = 7,162.65/x
  3. Step 3: Cross multiply
    13,131.05x = 18,121.01 × 7,162.65
  4. Step 4: Simplify right side
    13,131.05x = 129,794,416.46
  5. Step 5: Solve for x
    x = 129,794,416.46/13,131.05
  6. Step 6: Final answer
    x = 9,884.55

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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.