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Finding the Fourth Proportional to 31,328.56, 43,230 and 17,181.28

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Solution

The fourth proportional to 31,328.56, 43,230 and 17,181.28 is: 23,708.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,328.56 : 43,230 = 17,181.28 : x
  2. Step 2: Convert to fraction form
    31,328.56/43,230 = 17,181.28/x
  3. Step 3: Cross multiply
    31,328.56x = 43,230 × 17,181.28
  4. Step 4: Simplify right side
    31,328.56x = 742,746,734.40
  5. Step 5: Solve for x
    x = 742,746,734.40/31,328.56
  6. Step 6: Final answer
    x = 23,708.29

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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.