Home / 21,611.28-32,416.96-12,255.78

Finding the Fourth Proportional to 21,611.28, 32,416.96 and 12,255.78

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Solution

The fourth proportional to 21,611.28, 32,416.96 and 12,255.78 is: 18,383.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.28 : 32,416.96 = 12,255.78 : x
  2. Step 2: Convert to fraction form
    21,611.28/32,416.96 = 12,255.78/x
  3. Step 3: Cross multiply
    21,611.28x = 32,416.96 × 12,255.78
  4. Step 4: Simplify right side
    21,611.28x = 397,295,130.03
  5. Step 5: Solve for x
    x = 397,295,130.03/21,611.28
  6. Step 6: Final answer
    x = 18,383.69

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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.