Home / 13,171.12-18,175.87-7,202.72

Finding the Fourth Proportional to 13,171.12, 18,175.87 and 7,202.72

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Solution

The fourth proportional to 13,171.12, 18,175.87 and 7,202.72 is: 9,939.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,171.12 : 18,175.87 = 7,202.72 : x
  2. Step 2: Convert to fraction form
    13,171.12/18,175.87 = 7,202.72/x
  3. Step 3: Cross multiply
    13,171.12x = 18,175.87 × 7,202.72
  4. Step 4: Simplify right side
    13,171.12x = 130,915,702.37
  5. Step 5: Solve for x
    x = 130,915,702.37/13,171.12
  6. Step 6: Final answer
    x = 9,939.60

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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.