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Finding the Fourth Proportional to 31,317.16, 43,219.02 and 18,739.48

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Solution

The fourth proportional to 31,317.16, 43,219.02 and 18,739.48 is: 25,861.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,317.16 : 43,219.02 = 18,739.48 : x
  2. Step 2: Convert to fraction form
    31,317.16/43,219.02 = 18,739.48/x
  3. Step 3: Cross multiply
    31,317.16x = 43,219.02 × 18,739.48
  4. Step 4: Simplify right side
    31,317.16x = 809,901,960.91
  5. Step 5: Solve for x
    x = 809,901,960.91/31,317.16
  6. Step 6: Final answer
    x = 25,861.28

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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.