Home / 13,143.67-18,138.36-7,175.39

Finding the Fourth Proportional to 13,143.67, 18,138.36 and 7,175.39

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Solution

The fourth proportional to 13,143.67, 18,138.36 and 7,175.39 is: 9,902.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.67 : 18,138.36 = 7,175.39 : x
  2. Step 2: Convert to fraction form
    13,143.67/18,138.36 = 7,175.39/x
  3. Step 3: Cross multiply
    13,143.67x = 18,138.36 × 7,175.39
  4. Step 4: Simplify right side
    13,143.67x = 130,149,743.18
  5. Step 5: Solve for x
    x = 130,149,743.18/13,143.67
  6. Step 6: Final answer
    x = 9,902.09

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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.