Home / 13,212.48-18,236.70-8,175.90

Finding the Fourth Proportional to 13,212.48, 18,236.70 and 8,175.90

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Solution

The fourth proportional to 13,212.48, 18,236.70 and 8,175.90 is: 11,284.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212.48 : 18,236.70 = 8,175.90 : x
  2. Step 2: Convert to fraction form
    13,212.48/18,236.70 = 8,175.90/x
  3. Step 3: Cross multiply
    13,212.48x = 18,236.70 × 8,175.90
  4. Step 4: Simplify right side
    13,212.48x = 149,101,435.53
  5. Step 5: Solve for x
    x = 149,101,435.53/13,212.48
  6. Step 6: Final answer
    x = 11,284.89

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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.