Home / 13,186.36-18,197.18-7,218.06

Finding the Fourth Proportional to 13,186.36, 18,197.18 and 7,218.06

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Solution

The fourth proportional to 13,186.36, 18,197.18 and 7,218.06 is: 9,960.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.36 : 18,197.18 = 7,218.06 : x
  2. Step 2: Convert to fraction form
    13,186.36/18,197.18 = 7,218.06/x
  3. Step 3: Cross multiply
    13,186.36x = 18,197.18 × 7,218.06
  4. Step 4: Simplify right side
    13,186.36x = 131,348,400.61
  5. Step 5: Solve for x
    x = 131,348,400.61/13,186.36
  6. Step 6: Final answer
    x = 9,960.93

Related Problems

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Half scale
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Double scale
Find fourth proportional to 13,187.36, 18,198.56 and 7,219.06
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.