Home / 9,190.70-12,682.78-5,212.09

Finding the Fourth Proportional to 9,190.70, 12,682.78 and 5,212.09

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Solution

The fourth proportional to 9,190.70, 12,682.78 and 5,212.09 is: 7,192.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,190.70 : 12,682.78 = 5,212.09 : x
  2. Step 2: Convert to fraction form
    9,190.70/12,682.78 = 5,212.09/x
  3. Step 3: Cross multiply
    9,190.70x = 12,682.78 × 5,212.09
  4. Step 4: Simplify right side
    9,190.70x = 66,103,790.81
  5. Step 5: Solve for x
    x = 66,103,790.81/9,190.70
  6. Step 6: Final answer
    x = 7,192.47

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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.