Home / 13,131.07-18,120.93-7,162.87

Finding the Fourth Proportional to 13,131.07, 18,120.93 and 7,162.87

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Solution

The fourth proportional to 13,131.07, 18,120.93 and 7,162.87 is: 9,884.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.07 : 18,120.93 = 7,162.87 : x
  2. Step 2: Convert to fraction form
    13,131.07/18,120.93 = 7,162.87/x
  3. Step 3: Cross multiply
    13,131.07x = 18,120.93 × 7,162.87
  4. Step 4: Simplify right side
    13,131.07x = 129,797,820.57
  5. Step 5: Solve for x
    x = 129,797,820.57/13,131.07
  6. Step 6: Final answer
    x = 9,884.79

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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.