Home / 43,621.20-65,431.80-19,928.70

Finding the Fourth Proportional to 43,621.20, 65,431.80 and 19,928.70

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Solution

The fourth proportional to 43,621.20, 65,431.80 and 19,928.70 is: 29,893.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,621.20 : 65,431.80 = 19,928.70 : x
  2. Step 2: Convert to fraction form
    43,621.20/65,431.80 = 19,928.70/x
  3. Step 3: Cross multiply
    43,621.20x = 65,431.80 × 19,928.70
  4. Step 4: Simplify right side
    43,621.20x = 1,303,970,712.66
  5. Step 5: Solve for x
    x = 1,303,970,712.66/43,621.20
  6. Step 6: Final answer
    x = 29,893.05

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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.