Home / 13,143.35-18,138.11-7,175.27

Finding the Fourth Proportional to 13,143.35, 18,138.11 and 7,175.27

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Solution

The fourth proportional to 13,143.35, 18,138.11 and 7,175.27 is: 9,902.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.35 : 18,138.11 = 7,175.27 : x
  2. Step 2: Convert to fraction form
    13,143.35/18,138.11 = 7,175.27/x
  3. Step 3: Cross multiply
    13,143.35x = 18,138.11 × 7,175.27
  4. Step 4: Simplify right side
    13,143.35x = 130,145,800.66
  5. Step 5: Solve for x
    x = 130,145,800.66/13,143.35
  6. Step 6: Final answer
    x = 9,902.03

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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.