Home / 13,186.95-18,198.65-7,218.87

Finding the Fourth Proportional to 13,186.95, 18,198.65 and 7,218.87

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Solution

The fourth proportional to 13,186.95, 18,198.65 and 7,218.87 is: 9,962.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.95 : 18,198.65 = 7,218.87 : x
  2. Step 2: Convert to fraction form
    13,186.95/18,198.65 = 7,218.87/x
  3. Step 3: Cross multiply
    13,186.95x = 18,198.65 × 7,218.87
  4. Step 4: Simplify right side
    13,186.95x = 131,373,720.39
  5. Step 5: Solve for x
    x = 131,373,720.39/13,186.95
  6. Step 6: Final answer
    x = 9,962.40

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Double scale
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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.