Home / 19,640.80-29,425.20-9,229.60

Finding the Fourth Proportional to 19,640.80, 29,425.20 and 9,229.60

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Solution

The fourth proportional to 19,640.80, 29,425.20 and 9,229.60 is: 13,827.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.80 : 29,425.20 = 9,229.60 : x
  2. Step 2: Convert to fraction form
    19,640.80/29,425.20 = 9,229.60/x
  3. Step 3: Cross multiply
    19,640.80x = 29,425.20 × 9,229.60
  4. Step 4: Simplify right side
    19,640.80x = 271,582,825.92
  5. Step 5: Solve for x
    x = 271,582,825.92/19,640.80
  6. Step 6: Final answer
    x = 13,827.48

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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.