Home / 13,186.40-18,197.66-7,218.32

Finding the Fourth Proportional to 13,186.40, 18,197.66 and 7,218.32

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Solution

The fourth proportional to 13,186.40, 18,197.66 and 7,218.32 is: 9,961.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.40 : 18,197.66 = 7,218.32 : x
  2. Step 2: Convert to fraction form
    13,186.40/18,197.66 = 7,218.32/x
  3. Step 3: Cross multiply
    13,186.40x = 18,197.66 × 7,218.32
  4. Step 4: Simplify right side
    13,186.40x = 131,356,460.19
  5. Step 5: Solve for x
    x = 131,356,460.19/13,186.40
  6. Step 6: Final answer
    x = 9,961.51

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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.