Home / 21,272.21-29,356.62-11,840.75

Finding the Fourth Proportional to 21,272.21, 29,356.62 and 11,840.75

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Solution

The fourth proportional to 21,272.21, 29,356.62 and 11,840.75 is: 16,340.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.21 : 29,356.62 = 11,840.75 : x
  2. Step 2: Convert to fraction form
    21,272.21/29,356.62 = 11,840.75/x
  3. Step 3: Cross multiply
    21,272.21x = 29,356.62 × 11,840.75
  4. Step 4: Simplify right side
    21,272.21x = 347,604,398.27
  5. Step 5: Solve for x
    x = 347,604,398.27/21,272.21
  6. Step 6: Final answer
    x = 16,340.78

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Double scale
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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.