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Finding the Fourth Proportional to 21,995.60, 32,974.20 and 19,662.80

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Solution

The fourth proportional to 21,995.60, 32,974.20 and 19,662.80 is: 29,477.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.60 : 32,974.20 = 19,662.80 : x
  2. Step 2: Convert to fraction form
    21,995.60/32,974.20 = 19,662.80/x
  3. Step 3: Cross multiply
    21,995.60x = 32,974.20 × 19,662.80
  4. Step 4: Simplify right side
    21,995.60x = 648,365,099.76
  5. Step 5: Solve for x
    x = 648,365,099.76/21,995.60
  6. Step 6: Final answer
    x = 29,477.04

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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.