Home / 19,820.60-29,705.70-8,120.60

Finding the Fourth Proportional to 19,820.60, 29,705.70 and 8,120.60

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Solution

The fourth proportional to 19,820.60, 29,705.70 and 8,120.60 is: 12,170.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,820.60 : 29,705.70 = 8,120.60 : x
  2. Step 2: Convert to fraction form
    19,820.60/29,705.70 = 8,120.60/x
  3. Step 3: Cross multiply
    19,820.60x = 29,705.70 × 8,120.60
  4. Step 4: Simplify right side
    19,820.60x = 241,228,107.42
  5. Step 5: Solve for x
    x = 241,228,107.42/19,820.60
  6. Step 6: Final answer
    x = 12,170.58

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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.