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Finding the Fourth Proportional to 13,993.72, 19,311 and 8,028.88

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Solution

The fourth proportional to 13,993.72, 19,311 and 8,028.88 is: 11,079.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,993.72 : 19,311 = 8,028.88 : x
  2. Step 2: Convert to fraction form
    13,993.72/19,311 = 8,028.88/x
  3. Step 3: Cross multiply
    13,993.72x = 19,311 × 8,028.88
  4. Step 4: Simplify right side
    13,993.72x = 155,045,701.68
  5. Step 5: Solve for x
    x = 155,045,701.68/13,993.72
  6. Step 6: Final answer
    x = 11,079.66

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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.