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Finding the Fourth Proportional to 18,328.70, 25,293.90 and 9,945.20

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Solution

The fourth proportional to 18,328.70, 25,293.90 and 9,945.20 is: 13,724.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,328.70 : 25,293.90 = 9,945.20 : x
  2. Step 2: Convert to fraction form
    18,328.70/25,293.90 = 9,945.20/x
  3. Step 3: Cross multiply
    18,328.70x = 25,293.90 × 9,945.20
  4. Step 4: Simplify right side
    18,328.70x = 251,552,894.28
  5. Step 5: Solve for x
    x = 251,552,894.28/18,328.70
  6. Step 6: Final answer
    x = 13,724.54

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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.