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Finding the Fourth Proportional to 12,539.64, 18,785.16 and 11,820.36

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Solution

The fourth proportional to 12,539.64, 18,785.16 and 11,820.36 is: 17,707.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.64 : 18,785.16 = 11,820.36 : x
  2. Step 2: Convert to fraction form
    12,539.64/18,785.16 = 11,820.36/x
  3. Step 3: Cross multiply
    12,539.64x = 18,785.16 × 11,820.36
  4. Step 4: Simplify right side
    12,539.64x = 222,047,353.86
  5. Step 5: Solve for x
    x = 222,047,353.86/12,539.64
  6. Step 6: Final answer
    x = 17,707.63

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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.