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Finding the Fourth Proportional to 43,228.80, 64,792.80 and 19,857.60

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Solution

The fourth proportional to 43,228.80, 64,792.80 and 19,857.60 is: 29,763.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,228.80 : 64,792.80 = 19,857.60 : x
  2. Step 2: Convert to fraction form
    43,228.80/64,792.80 = 19,857.60/x
  3. Step 3: Cross multiply
    43,228.80x = 64,792.80 × 19,857.60
  4. Step 4: Simplify right side
    43,228.80x = 1,286,629,505.28
  5. Step 5: Solve for x
    x = 1,286,629,505.28/43,228.80
  6. Step 6: Final answer
    x = 29,763.25

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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.