Home / 28,212.50-38,906.43-21,486.26

Finding the Fourth Proportional to 28,212.50, 38,906.43 and 21,486.26

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Solution

The fourth proportional to 28,212.50, 38,906.43 and 21,486.26 is: 29,630.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.50 : 38,906.43 = 21,486.26 : x
  2. Step 2: Convert to fraction form
    28,212.50/38,906.43 = 21,486.26/x
  3. Step 3: Cross multiply
    28,212.50x = 38,906.43 × 21,486.26
  4. Step 4: Simplify right side
    28,212.50x = 835,953,687.34
  5. Step 5: Solve for x
    x = 835,953,687.34/28,212.50
  6. Step 6: Final answer
    x = 29,630.61

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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.