Home / 21,542.67-29,728.53-12,111.21

Finding the Fourth Proportional to 21,542.67, 29,728.53 and 12,111.21

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Solution

The fourth proportional to 21,542.67, 29,728.53 and 12,111.21 is: 16,713.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,542.67 : 29,728.53 = 12,111.21 : x
  2. Step 2: Convert to fraction form
    21,542.67/29,728.53 = 12,111.21/x
  3. Step 3: Cross multiply
    21,542.67x = 29,728.53 × 12,111.21
  4. Step 4: Simplify right side
    21,542.67x = 360,048,469.82
  5. Step 5: Solve for x
    x = 360,048,469.82/21,542.67
  6. Step 6: Final answer
    x = 16,713.27

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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.