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Finding the Fourth Proportional to 19,654.40, 29,485.20 and 7,968.80

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Solution

The fourth proportional to 19,654.40, 29,485.20 and 7,968.80 is: 11,954.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,654.40 : 29,485.20 = 7,968.80 : x
  2. Step 2: Convert to fraction form
    19,654.40/29,485.20 = 7,968.80/x
  3. Step 3: Cross multiply
    19,654.40x = 29,485.20 × 7,968.80
  4. Step 4: Simplify right side
    19,654.40x = 234,961,661.76
  5. Step 5: Solve for x
    x = 234,961,661.76/19,654.40
  6. Step 6: Final answer
    x = 11,954.66

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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.