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Finding the Fourth Proportional to 25,620, 38,430 and 7,152

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Solution

The fourth proportional to 25,620, 38,430 and 7,152 is: 10,728

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,620 : 38,430 = 7,152 : x
  2. Step 2: Convert to fraction form
    25,620/38,430 = 7,152/x
  3. Step 3: Cross multiply
    25,620x = 38,430 × 7,152
  4. Step 4: Simplify right side
    25,620x = 274,851,360
  5. Step 5: Solve for x
    x = 274,851,360/25,620
  6. Step 6: Final answer
    x = 10,728

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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.