Home / 21,238.60-29,301.09-13,684.33

Finding the Fourth Proportional to 21,238.60, 29,301.09 and 13,684.33

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Solution

The fourth proportional to 21,238.60, 29,301.09 and 13,684.33 is: 18,879.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.60 : 29,301.09 = 13,684.33 : x
  2. Step 2: Convert to fraction form
    21,238.60/29,301.09 = 13,684.33/x
  3. Step 3: Cross multiply
    21,238.60x = 29,301.09 × 13,684.33
  4. Step 4: Simplify right side
    21,238.60x = 400,965,784.92
  5. Step 5: Solve for x
    x = 400,965,784.92/21,238.60
  6. Step 6: Final answer
    x = 18,879.11

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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.