Home / 21,825.20-32,721.60-8,670.80

Finding the Fourth Proportional to 21,825.20, 32,721.60 and 8,670.80

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Solution

The fourth proportional to 21,825.20, 32,721.60 and 8,670.80 is: 12,999.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,825.20 : 32,721.60 = 8,670.80 : x
  2. Step 2: Convert to fraction form
    21,825.20/32,721.60 = 8,670.80/x
  3. Step 3: Cross multiply
    21,825.20x = 32,721.60 × 8,670.80
  4. Step 4: Simplify right side
    21,825.20x = 283,722,449.28
  5. Step 5: Solve for x
    x = 283,722,449.28/21,825.20
  6. Step 6: Final answer
    x = 12,999.76

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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.