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Finding the Fourth Proportional to 13,992.72, 19,310.43 and 7,619.56

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Solution

The fourth proportional to 13,992.72, 19,310.43 and 7,619.56 is: 10,515.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.72 : 19,310.43 = 7,619.56 : x
  2. Step 2: Convert to fraction form
    13,992.72/19,310.43 = 7,619.56/x
  3. Step 3: Cross multiply
    13,992.72x = 19,310.43 × 7,619.56
  4. Step 4: Simplify right side
    13,992.72x = 147,137,004.15
  5. Step 5: Solve for x
    x = 147,137,004.15/13,992.72
  6. Step 6: Final answer
    x = 10,515.25

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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.