Home / 21,621.90-29,837.13-12,190.26

Finding the Fourth Proportional to 21,621.90, 29,837.13 and 12,190.26

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Solution

The fourth proportional to 21,621.90, 29,837.13 and 12,190.26 is: 16,821.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.90 : 29,837.13 = 12,190.26 : x
  2. Step 2: Convert to fraction form
    21,621.90/29,837.13 = 12,190.26/x
  3. Step 3: Cross multiply
    21,621.90x = 29,837.13 × 12,190.26
  4. Step 4: Simplify right side
    21,621.90x = 363,722,372.35
  5. Step 5: Solve for x
    x = 363,722,372.35/21,621.90
  6. Step 6: Final answer
    x = 16,821.94

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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.