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Finding the Fourth Proportional to 13,103.84, 18,083.84 and 7,515.92

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Solution

The fourth proportional to 13,103.84, 18,083.84 and 7,515.92 is: 10,372.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,103.84 : 18,083.84 = 7,515.92 : x
  2. Step 2: Convert to fraction form
    13,103.84/18,083.84 = 7,515.92/x
  3. Step 3: Cross multiply
    13,103.84x = 18,083.84 × 7,515.92
  4. Step 4: Simplify right side
    13,103.84x = 135,916,694.73
  5. Step 5: Solve for x
    x = 135,916,694.73/13,103.84
  6. Step 6: Final answer
    x = 10,372.28

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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.