Home / 13,143.56-18,138.35-7,175.48

Finding the Fourth Proportional to 13,143.56, 18,138.35 and 7,175.48

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Solution

The fourth proportional to 13,143.56, 18,138.35 and 7,175.48 is: 9,902.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.56 : 18,138.35 = 7,175.48 : x
  2. Step 2: Convert to fraction form
    13,143.56/18,138.35 = 7,175.48/x
  3. Step 3: Cross multiply
    13,143.56x = 18,138.35 × 7,175.48
  4. Step 4: Simplify right side
    13,143.56x = 130,151,331.78
  5. Step 5: Solve for x
    x = 130,151,331.78/13,143.56
  6. Step 6: Final answer
    x = 9,902.29

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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.