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Finding the Fourth Proportional to 18,903.71, 28,361.88 and 8,372.30

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Solution

The fourth proportional to 18,903.71, 28,361.88 and 8,372.30 is: 12,561.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.71 : 28,361.88 = 8,372.30 : x
  2. Step 2: Convert to fraction form
    18,903.71/28,361.88 = 8,372.30/x
  3. Step 3: Cross multiply
    18,903.71x = 28,361.88 × 8,372.30
  4. Step 4: Simplify right side
    18,903.71x = 237,454,026.11
  5. Step 5: Solve for x
    x = 237,454,026.11/18,903.71
  6. Step 6: Final answer
    x = 12,561.24

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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.