Home / 13,186.72-18,197.63-7,218.33

Finding the Fourth Proportional to 13,186.72, 18,197.63 and 7,218.33

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Solution

The fourth proportional to 13,186.72, 18,197.63 and 7,218.33 is: 9,961.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.72 : 18,197.63 = 7,218.33 : x
  2. Step 2: Convert to fraction form
    13,186.72/18,197.63 = 7,218.33/x
  3. Step 3: Cross multiply
    13,186.72x = 18,197.63 × 7,218.33
  4. Step 4: Simplify right side
    13,186.72x = 131,356,523.66
  5. Step 5: Solve for x
    x = 131,356,523.66/13,186.72
  6. Step 6: Final answer
    x = 9,961.28

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Half scale
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Double scale
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Similar ratio
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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.