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Finding the Fourth Proportional to 30,745, 42,428.37 and 18,645.22

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Solution

The fourth proportional to 30,745, 42,428.37 and 18,645.22 is: 25,730.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,745 : 42,428.37 = 18,645.22 : x
  2. Step 2: Convert to fraction form
    30,745/42,428.37 = 18,645.22/x
  3. Step 3: Cross multiply
    30,745x = 42,428.37 × 18,645.22
  4. Step 4: Simplify right side
    30,745x = 791,086,292.89
  5. Step 5: Solve for x
    x = 791,086,292.89/30,745
  6. Step 6: Final answer
    x = 25,730.57

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.