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Finding the Fourth Proportional to 15,017.94, 20,713.50 and 13,318.44

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Solution

The fourth proportional to 15,017.94, 20,713.50 and 13,318.44 is: 18,369.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,017.94 : 20,713.50 = 13,318.44 : x
  2. Step 2: Convert to fraction form
    15,017.94/20,713.50 = 13,318.44/x
  3. Step 3: Cross multiply
    15,017.94x = 20,713.50 × 13,318.44
  4. Step 4: Simplify right side
    15,017.94x = 275,871,506.94
  5. Step 5: Solve for x
    x = 275,871,506.94/15,017.94
  6. Step 6: Final answer
    x = 18,369.46

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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.