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Finding the Fourth Proportional to 21,245.62, 29,307 and 12,745.48

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Solution

The fourth proportional to 21,245.62, 29,307 and 12,745.48 is: 17,581.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.62 : 29,307 = 12,745.48 : x
  2. Step 2: Convert to fraction form
    21,245.62/29,307 = 12,745.48/x
  3. Step 3: Cross multiply
    21,245.62x = 29,307 × 12,745.48
  4. Step 4: Simplify right side
    21,245.62x = 373,531,782.36
  5. Step 5: Solve for x
    x = 373,531,782.36/21,245.62
  6. Step 6: Final answer
    x = 17,581.59

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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.