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Finding the Fourth Proportional to 18,515.34, 25,551.18 and 10,131.84

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Solution

The fourth proportional to 18,515.34, 25,551.18 and 10,131.84 is: 13,981.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.34 : 25,551.18 = 10,131.84 : x
  2. Step 2: Convert to fraction form
    18,515.34/25,551.18 = 10,131.84/x
  3. Step 3: Cross multiply
    18,515.34x = 25,551.18 × 10,131.84
  4. Step 4: Simplify right side
    18,515.34x = 258,880,467.57
  5. Step 5: Solve for x
    x = 258,880,467.57/18,515.34
  6. Step 6: Final answer
    x = 13,981.95

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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.