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Finding the Fourth Proportional to 28,994.42, 40,011.18 and 16,419.20

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Solution

The fourth proportional to 28,994.42, 40,011.18 and 16,419.20 is: 22,657.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,994.42 : 40,011.18 = 16,419.20 : x
  2. Step 2: Convert to fraction form
    28,994.42/40,011.18 = 16,419.20/x
  3. Step 3: Cross multiply
    28,994.42x = 40,011.18 × 16,419.20
  4. Step 4: Simplify right side
    28,994.42x = 656,951,566.66
  5. Step 5: Solve for x
    x = 656,951,566.66/28,994.42
  6. Step 6: Final answer
    x = 22,657.86

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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.