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Finding the Fourth Proportional to 19,620, 29,430 and 5,028

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Solution

The fourth proportional to 19,620, 29,430 and 5,028 is: 7,542

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,620 : 29,430 = 5,028 : x
  2. Step 2: Convert to fraction form
    19,620/29,430 = 5,028/x
  3. Step 3: Cross multiply
    19,620x = 29,430 × 5,028
  4. Step 4: Simplify right side
    19,620x = 147,974,040
  5. Step 5: Solve for x
    x = 147,974,040/19,620
  6. Step 6: Final answer
    x = 7,542

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.