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Finding the Fourth Proportional to 13,356, 18,431.28 and 7,692.48

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Solution

The fourth proportional to 13,356, 18,431.28 and 7,692.48 is: 10,615.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356 : 18,431.28 = 7,692.48 : x
  2. Step 2: Convert to fraction form
    13,356/18,431.28 = 7,692.48/x
  3. Step 3: Cross multiply
    13,356x = 18,431.28 × 7,692.48
  4. Step 4: Simplify right side
    13,356x = 141,782,252.77
  5. Step 5: Solve for x
    x = 141,782,252.77/13,356
  6. Step 6: Final answer
    x = 10,615.62

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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.