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Finding the Fourth Proportional to 30,121.73, 45,141.04 and 21,734.92

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Solution

The fourth proportional to 30,121.73, 45,141.04 and 21,734.92 is: 32,572.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,121.73 : 45,141.04 = 21,734.92 : x
  2. Step 2: Convert to fraction form
    30,121.73/45,141.04 = 21,734.92/x
  3. Step 3: Cross multiply
    30,121.73x = 45,141.04 × 21,734.92
  4. Step 4: Simplify right side
    30,121.73x = 981,136,893.12
  5. Step 5: Solve for x
    x = 981,136,893.12/30,121.73
  6. Step 6: Final answer
    x = 32,572.40

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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.