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Finding the Fourth Proportional to 19,114.10, 28,671.12 and 12,538.72

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Solution

The fourth proportional to 19,114.10, 28,671.12 and 12,538.72 is: 18,808.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,114.10 : 28,671.12 = 12,538.72 : x
  2. Step 2: Convert to fraction form
    19,114.10/28,671.12 = 12,538.72/x
  3. Step 3: Cross multiply
    19,114.10x = 28,671.12 × 12,538.72
  4. Step 4: Simplify right side
    19,114.10x = 359,499,145.77
  5. Step 5: Solve for x
    x = 359,499,145.77/19,114.10
  6. Step 6: Final answer
    x = 18,808.06

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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.