Home / 21,160.08-29,201.04-11,728.80

Finding the Fourth Proportional to 21,160.08, 29,201.04 and 11,728.80

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Solution

The fourth proportional to 21,160.08, 29,201.04 and 11,728.80 is: 16,185.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.08 : 29,201.04 = 11,728.80 : x
  2. Step 2: Convert to fraction form
    21,160.08/29,201.04 = 11,728.80/x
  3. Step 3: Cross multiply
    21,160.08x = 29,201.04 × 11,728.80
  4. Step 4: Simplify right side
    21,160.08x = 342,493,157.95
  5. Step 5: Solve for x
    x = 342,493,157.95/21,160.08
  6. Step 6: Final answer
    x = 16,185.82

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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.