Home / 19,489.20-29,185.20-12,879.60

Finding the Fourth Proportional to 19,489.20, 29,185.20 and 12,879.60

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Solution

The fourth proportional to 19,489.20, 29,185.20 and 12,879.60 is: 19,287.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.20 : 29,185.20 = 12,879.60 : x
  2. Step 2: Convert to fraction form
    19,489.20/29,185.20 = 12,879.60/x
  3. Step 3: Cross multiply
    19,489.20x = 29,185.20 × 12,879.60
  4. Step 4: Simplify right side
    19,489.20x = 375,893,701.92
  5. Step 5: Solve for x
    x = 375,893,701.92/19,489.20
  6. Step 6: Final answer
    x = 19,287.28

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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.