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Finding the Fourth Proportional to 19,796.80, 29,662.80 and 18,630.40

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Solution

The fourth proportional to 19,796.80, 29,662.80 and 18,630.40 is: 27,915.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,796.80 : 29,662.80 = 18,630.40 : x
  2. Step 2: Convert to fraction form
    19,796.80/29,662.80 = 18,630.40/x
  3. Step 3: Cross multiply
    19,796.80x = 29,662.80 × 18,630.40
  4. Step 4: Simplify right side
    19,796.80x = 552,629,829.12
  5. Step 5: Solve for x
    x = 552,629,829.12/19,796.80
  6. Step 6: Final answer
    x = 27,915.11

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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.