Home / 21,679.75-29,922.88-13,180.07

Finding the Fourth Proportional to 21,679.75, 29,922.88 and 13,180.07

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Solution

The fourth proportional to 21,679.75, 29,922.88 and 13,180.07 is: 18,191.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.75 : 29,922.88 = 13,180.07 : x
  2. Step 2: Convert to fraction form
    21,679.75/29,922.88 = 13,180.07/x
  3. Step 3: Cross multiply
    21,679.75x = 29,922.88 × 13,180.07
  4. Step 4: Simplify right side
    21,679.75x = 394,385,587.10
  5. Step 5: Solve for x
    x = 394,385,587.10/21,679.75
  6. Step 6: Final answer
    x = 18,191.43

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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.