Home / 13,186.85-18,197.61-7,218.41

Finding the Fourth Proportional to 13,186.85, 18,197.61 and 7,218.41

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Solution

The fourth proportional to 13,186.85, 18,197.61 and 7,218.41 is: 9,961.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.85 : 18,197.61 = 7,218.41 : x
  2. Step 2: Convert to fraction form
    13,186.85/18,197.61 = 7,218.41/x
  3. Step 3: Cross multiply
    13,186.85x = 18,197.61 × 7,218.41
  4. Step 4: Simplify right side
    13,186.85x = 131,357,810.00
  5. Step 5: Solve for x
    x = 131,357,810.00/13,186.85
  6. Step 6: Final answer
    x = 9,961.27

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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.