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Finding the Fourth Proportional to 29,420.32, 40,589.84 and 18,816.16

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Solution

The fourth proportional to 29,420.32, 40,589.84 and 18,816.16 is: 25,959.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,420.32 : 40,589.84 = 18,816.16 : x
  2. Step 2: Convert to fraction form
    29,420.32/40,589.84 = 18,816.16/x
  3. Step 3: Cross multiply
    29,420.32x = 40,589.84 × 18,816.16
  4. Step 4: Simplify right side
    29,420.32x = 763,744,923.81
  5. Step 5: Solve for x
    x = 763,744,923.81/29,420.32
  6. Step 6: Final answer
    x = 25,959.78

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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.