Home / 13,619.63-18,800.82-12,768.41

Finding the Fourth Proportional to 13,619.63, 18,800.82 and 12,768.41

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Solution

The fourth proportional to 13,619.63, 18,800.82 and 12,768.41 is: 17,625.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.63 : 18,800.82 = 12,768.41 : x
  2. Step 2: Convert to fraction form
    13,619.63/18,800.82 = 12,768.41/x
  3. Step 3: Cross multiply
    13,619.63x = 18,800.82 × 12,768.41
  4. Step 4: Simplify right side
    13,619.63x = 240,056,625.10
  5. Step 5: Solve for x
    x = 240,056,625.10/13,619.63
  6. Step 6: Final answer
    x = 17,625.78

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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.