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Finding the Fourth Proportional to 13,235.78, 18,265.27 and 7,185.87

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Solution

The fourth proportional to 13,235.78, 18,265.27 and 7,185.87 is: 9,916.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,235.78 : 18,265.27 = 7,185.87 : x
  2. Step 2: Convert to fraction form
    13,235.78/18,265.27 = 7,185.87/x
  3. Step 3: Cross multiply
    13,235.78x = 18,265.27 × 7,185.87
  4. Step 4: Simplify right side
    13,235.78x = 131,251,855.73
  5. Step 5: Solve for x
    x = 131,251,855.73/13,235.78
  6. Step 6: Final answer
    x = 9,916.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.