Home / 21,122.54-29,147.12-12,622.97

Finding the Fourth Proportional to 21,122.54, 29,147.12 and 12,622.97

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Solution

The fourth proportional to 21,122.54, 29,147.12 and 12,622.97 is: 17,418.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.54 : 29,147.12 = 12,622.97 : x
  2. Step 2: Convert to fraction form
    21,122.54/29,147.12 = 12,622.97/x
  3. Step 3: Cross multiply
    21,122.54x = 29,147.12 × 12,622.97
  4. Step 4: Simplify right side
    21,122.54x = 367,923,012.50
  5. Step 5: Solve for x
    x = 367,923,012.50/21,122.54
  6. Step 6: Final answer
    x = 17,418.51

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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.