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Finding the Fourth Proportional to 13,651.87, 18,840.18 and 7,683.92

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Solution

The fourth proportional to 13,651.87, 18,840.18 and 7,683.92 is: 10,604.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,651.87 : 18,840.18 = 7,683.92 : x
  2. Step 2: Convert to fraction form
    13,651.87/18,840.18 = 7,683.92/x
  3. Step 3: Cross multiply
    13,651.87x = 18,840.18 × 7,683.92
  4. Step 4: Simplify right side
    13,651.87x = 144,766,435.91
  5. Step 5: Solve for x
    x = 144,766,435.91/13,651.87
  6. Step 6: Final answer
    x = 10,604.15

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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.