Home / 20,120.40-30,180.60-19,828.80

Finding the Fourth Proportional to 20,120.40, 30,180.60 and 19,828.80

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Solution

The fourth proportional to 20,120.40, 30,180.60 and 19,828.80 is: 29,743.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.40 : 30,180.60 = 19,828.80 : x
  2. Step 2: Convert to fraction form
    20,120.40/30,180.60 = 19,828.80/x
  3. Step 3: Cross multiply
    20,120.40x = 30,180.60 × 19,828.80
  4. Step 4: Simplify right side
    20,120.40x = 598,445,081.28
  5. Step 5: Solve for x
    x = 598,445,081.28/20,120.40
  6. Step 6: Final answer
    x = 29,743.20

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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.