Home / 21,480.08-32,221.20-7,440.80

Finding the Fourth Proportional to 21,480.08, 32,221.20 and 7,440.80

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Solution

The fourth proportional to 21,480.08, 32,221.20 and 7,440.80 is: 11,161.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,480.08 : 32,221.20 = 7,440.80 : x
  2. Step 2: Convert to fraction form
    21,480.08/32,221.20 = 7,440.80/x
  3. Step 3: Cross multiply
    21,480.08x = 32,221.20 × 7,440.80
  4. Step 4: Simplify right side
    21,480.08x = 239,751,504.96
  5. Step 5: Solve for x
    x = 239,751,504.96/21,480.08
  6. Step 6: Final answer
    x = 11,161.57

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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.