Home / 21,157.67-29,199.63-11,728.55

Finding the Fourth Proportional to 21,157.67, 29,199.63 and 11,728.55

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Solution

The fourth proportional to 21,157.67, 29,199.63 and 11,728.55 is: 16,186.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.67 : 29,199.63 = 11,728.55 : x
  2. Step 2: Convert to fraction form
    21,157.67/29,199.63 = 11,728.55/x
  3. Step 3: Cross multiply
    21,157.67x = 29,199.63 × 11,728.55
  4. Step 4: Simplify right side
    21,157.67x = 342,469,174.44
  5. Step 5: Solve for x
    x = 342,469,174.44/21,157.67
  6. Step 6: Final answer
    x = 16,186.53

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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.