Home / 13,181.46-18,189.86-7,212.74

Finding the Fourth Proportional to 13,181.46, 18,189.86 and 7,212.74

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Solution

The fourth proportional to 13,181.46, 18,189.86 and 7,212.74 is: 9,953.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.46 : 18,189.86 = 7,212.74 : x
  2. Step 2: Convert to fraction form
    13,181.46/18,189.86 = 7,212.74/x
  3. Step 3: Cross multiply
    13,181.46x = 18,189.86 × 7,212.74
  4. Step 4: Simplify right side
    13,181.46x = 131,198,786.39
  5. Step 5: Solve for x
    x = 131,198,786.39/13,181.46
  6. Step 6: Final answer
    x = 9,953.28

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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.