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Finding the Fourth Proportional to 13,651.94, 20,477.90 and 4,292.78

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Solution

The fourth proportional to 13,651.94, 20,477.90 and 4,292.78 is: 6,439.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,651.94 : 20,477.90 = 4,292.78 : x
  2. Step 2: Convert to fraction form
    13,651.94/20,477.90 = 4,292.78/x
  3. Step 3: Cross multiply
    13,651.94x = 20,477.90 × 4,292.78
  4. Step 4: Simplify right side
    13,651.94x = 87,907,118.95
  5. Step 5: Solve for x
    x = 87,907,118.95/13,651.94
  6. Step 6: Final answer
    x = 6,439.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.