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Finding the Fourth Proportional to 11,687.40, 17,531.08 and 4,289.05

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Solution

The fourth proportional to 11,687.40, 17,531.08 and 4,289.05 is: 6,433.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.40 : 17,531.08 = 4,289.05 : x
  2. Step 2: Convert to fraction form
    11,687.40/17,531.08 = 4,289.05/x
  3. Step 3: Cross multiply
    11,687.40x = 17,531.08 × 4,289.05
  4. Step 4: Simplify right side
    11,687.40x = 75,191,678.67
  5. Step 5: Solve for x
    x = 75,191,678.67/11,687.40
  6. Step 6: Final answer
    x = 6,433.57

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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.