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Finding the Fourth Proportional to 30,604.40, 45,906.60 and 21,273.20

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Solution

The fourth proportional to 30,604.40, 45,906.60 and 21,273.20 is: 31,909.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,604.40 : 45,906.60 = 21,273.20 : x
  2. Step 2: Convert to fraction form
    30,604.40/45,906.60 = 21,273.20/x
  3. Step 3: Cross multiply
    30,604.40x = 45,906.60 × 21,273.20
  4. Step 4: Simplify right side
    30,604.40x = 976,580,283.12
  5. Step 5: Solve for x
    x = 976,580,283.12/30,604.40
  6. Step 6: Final answer
    x = 31,909.80

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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.