Home / 21,272.22-29,355.72-11,840.78

Finding the Fourth Proportional to 21,272.22, 29,355.72 and 11,840.78

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Solution

The fourth proportional to 21,272.22, 29,355.72 and 11,840.78 is: 16,340.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.22 : 29,355.72 = 11,840.78 : x
  2. Step 2: Convert to fraction form
    21,272.22/29,355.72 = 11,840.78/x
  3. Step 3: Cross multiply
    21,272.22x = 29,355.72 × 11,840.78
  4. Step 4: Simplify right side
    21,272.22x = 347,594,651.25
  5. Step 5: Solve for x
    x = 347,594,651.25/21,272.22
  6. Step 6: Final answer
    x = 16,340.31

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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.