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Finding the Fourth Proportional to 13,993.68, 19,311.30 and 7,706.08

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Solution

The fourth proportional to 13,993.68, 19,311.30 and 7,706.08 is: 10,634.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,993.68 : 19,311.30 = 7,706.08 : x
  2. Step 2: Convert to fraction form
    13,993.68/19,311.30 = 7,706.08/x
  3. Step 3: Cross multiply
    13,993.68x = 19,311.30 × 7,706.08
  4. Step 4: Simplify right side
    13,993.68x = 148,814,422.70
  5. Step 5: Solve for x
    x = 148,814,422.70/13,993.68
  6. Step 6: Final answer
    x = 10,634.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.