Home / 12,406.22-17,120.91-7,102.75

Finding the Fourth Proportional to 12,406.22, 17,120.91 and 7,102.75

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Solution

The fourth proportional to 12,406.22, 17,120.91 and 7,102.75 is: 9,801.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,406.22 : 17,120.91 = 7,102.75 : x
  2. Step 2: Convert to fraction form
    12,406.22/17,120.91 = 7,102.75/x
  3. Step 3: Cross multiply
    12,406.22x = 17,120.91 × 7,102.75
  4. Step 4: Simplify right side
    12,406.22x = 121,605,457.90
  5. Step 5: Solve for x
    x = 121,605,457.90/12,406.22
  6. Step 6: Final answer
    x = 9,801.97

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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.