Home / 21,388.45-32,090.88-8,905.12

Finding the Fourth Proportional to 21,388.45, 32,090.88 and 8,905.12

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Solution

The fourth proportional to 21,388.45, 32,090.88 and 8,905.12 is: 13,361.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.45 : 32,090.88 = 8,905.12 : x
  2. Step 2: Convert to fraction form
    21,388.45/32,090.88 = 8,905.12/x
  3. Step 3: Cross multiply
    21,388.45x = 32,090.88 × 8,905.12
  4. Step 4: Simplify right side
    21,388.45x = 285,773,092.78
  5. Step 5: Solve for x
    x = 285,773,092.78/21,388.45
  6. Step 6: Final answer
    x = 13,361.09

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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.