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Finding the Fourth Proportional to 13,198.85, 19,792.13 and 7,653.78

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Solution

The fourth proportional to 13,198.85, 19,792.13 and 7,653.78 is: 11,477.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,198.85 : 19,792.13 = 7,653.78 : x
  2. Step 2: Convert to fraction form
    13,198.85/19,792.13 = 7,653.78/x
  3. Step 3: Cross multiply
    13,198.85x = 19,792.13 × 7,653.78
  4. Step 4: Simplify right side
    13,198.85x = 151,484,570.48
  5. Step 5: Solve for x
    x = 151,484,570.48/13,198.85
  6. Step 6: Final answer
    x = 11,477.11

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1.5x scale

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.