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Finding the Fourth Proportional to 21,858.94, 32,786.78 and 8,714.26

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Solution

The fourth proportional to 21,858.94, 32,786.78 and 8,714.26 is: 13,070.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.94 : 32,786.78 = 8,714.26 : x
  2. Step 2: Convert to fraction form
    21,858.94/32,786.78 = 8,714.26/x
  3. Step 3: Cross multiply
    21,858.94x = 32,786.78 × 8,714.26
  4. Step 4: Simplify right side
    21,858.94x = 285,712,361.55
  5. Step 5: Solve for x
    x = 285,712,361.55/21,858.94
  6. Step 6: Final answer
    x = 13,070.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.