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Finding the Fourth Proportional to 8,985.75, 13,478.31 and 2,745.51

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Solution

The fourth proportional to 8,985.75, 13,478.31 and 2,745.51 is: 4,118.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.75 : 13,478.31 = 2,745.51 : x
  2. Step 2: Convert to fraction form
    8,985.75/13,478.31 = 2,745.51/x
  3. Step 3: Cross multiply
    8,985.75x = 13,478.31 × 2,745.51
  4. Step 4: Simplify right side
    8,985.75x = 37,004,834.89
  5. Step 5: Solve for x
    x = 37,004,834.89/8,985.75
  6. Step 6: Final answer
    x = 4,118.17

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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.