Home / 21,629.25-29,848.50-13,245.75

Finding the Fourth Proportional to 21,629.25, 29,848.50 and 13,245.75

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Solution

The fourth proportional to 21,629.25, 29,848.50 and 13,245.75 is: 18,279.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,629.25 : 29,848.50 = 13,245.75 : x
  2. Step 2: Convert to fraction form
    21,629.25/29,848.50 = 13,245.75/x
  3. Step 3: Cross multiply
    21,629.25x = 29,848.50 × 13,245.75
  4. Step 4: Simplify right side
    21,629.25x = 395,365,768.88
  5. Step 5: Solve for x
    x = 395,365,768.88/21,629.25
  6. Step 6: Final answer
    x = 18,279.22

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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.