Home / 21,608.37-29,778.84-15,629.90

Finding the Fourth Proportional to 21,608.37, 29,778.84 and 15,629.90

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Solution

The fourth proportional to 21,608.37, 29,778.84 and 15,629.90 is: 21,539.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,608.37 : 29,778.84 = 15,629.90 : x
  2. Step 2: Convert to fraction form
    21,608.37/29,778.84 = 15,629.90/x
  3. Step 3: Cross multiply
    21,608.37x = 29,778.84 × 15,629.90
  4. Step 4: Simplify right side
    21,608.37x = 465,440,142.42
  5. Step 5: Solve for x
    x = 465,440,142.42/21,608.37
  6. Step 6: Final answer
    x = 21,539.81

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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.