Home / 13,128.64-18,121.27-7,466.44

Finding the Fourth Proportional to 13,128.64, 18,121.27 and 7,466.44

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Solution

The fourth proportional to 13,128.64, 18,121.27 and 7,466.44 is: 10,305.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.64 : 18,121.27 = 7,466.44 : x
  2. Step 2: Convert to fraction form
    13,128.64/18,121.27 = 7,466.44/x
  3. Step 3: Cross multiply
    13,128.64x = 18,121.27 × 7,466.44
  4. Step 4: Simplify right side
    13,128.64x = 135,301,375.18
  5. Step 5: Solve for x
    x = 135,301,375.18/13,128.64
  6. Step 6: Final answer
    x = 10,305.82

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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.