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Finding the Fourth Proportional to 8,991, 13,486.50 and 2,835

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Solution

The fourth proportional to 8,991, 13,486.50 and 2,835 is: 4,252.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991 : 13,486.50 = 2,835 : x
  2. Step 2: Convert to fraction form
    8,991/13,486.50 = 2,835/x
  3. Step 3: Cross multiply
    8,991x = 13,486.50 × 2,835
  4. Step 4: Simplify right side
    8,991x = 38,234,227.50
  5. Step 5: Solve for x
    x = 38,234,227.50/8,991
  6. Step 6: Final answer
    x = 4,252.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.