Home / 13,137.26-18,128.67-7,471.20

Finding the Fourth Proportional to 13,137.26, 18,128.67 and 7,471.20

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Solution

The fourth proportional to 13,137.26, 18,128.67 and 7,471.20 is: 10,309.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.26 : 18,128.67 = 7,471.20 : x
  2. Step 2: Convert to fraction form
    13,137.26/18,128.67 = 7,471.20/x
  3. Step 3: Cross multiply
    13,137.26x = 18,128.67 × 7,471.20
  4. Step 4: Simplify right side
    13,137.26x = 135,442,919.30
  5. Step 5: Solve for x
    x = 135,442,919.30/13,137.26
  6. Step 6: Final answer
    x = 10,309.83

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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.