Home / 21,713.90-29,960.33-13,220.46

Finding the Fourth Proportional to 21,713.90, 29,960.33 and 13,220.46

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Solution

The fourth proportional to 21,713.90, 29,960.33 and 13,220.46 is: 18,241.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,713.90 : 29,960.33 = 13,220.46 : x
  2. Step 2: Convert to fraction form
    21,713.90/29,960.33 = 13,220.46/x
  3. Step 3: Cross multiply
    21,713.90x = 29,960.33 × 13,220.46
  4. Step 4: Simplify right side
    21,713.90x = 396,089,278.25
  5. Step 5: Solve for x
    x = 396,089,278.25/21,713.90
  6. Step 6: Final answer
    x = 18,241.28

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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.