Home / 12,429.42-17,129.77-11,640.27

Finding the Fourth Proportional to 12,429.42, 17,129.77 and 11,640.27

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Solution

The fourth proportional to 12,429.42, 17,129.77 and 11,640.27 is: 16,042.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.42 : 17,129.77 = 11,640.27 : x
  2. Step 2: Convert to fraction form
    12,429.42/17,129.77 = 11,640.27/x
  3. Step 3: Cross multiply
    12,429.42x = 17,129.77 × 11,640.27
  4. Step 4: Simplify right side
    12,429.42x = 199,395,147.84
  5. Step 5: Solve for x
    x = 199,395,147.84/12,429.42
  6. Step 6: Final answer
    x = 16,042.19

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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.