Home / 13,408.80-18,501.28-8,102.56

Finding the Fourth Proportional to 13,408.80, 18,501.28 and 8,102.56

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Solution

The fourth proportional to 13,408.80, 18,501.28 and 8,102.56 is: 11,179.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.80 : 18,501.28 = 8,102.56 : x
  2. Step 2: Convert to fraction form
    13,408.80/18,501.28 = 8,102.56/x
  3. Step 3: Cross multiply
    13,408.80x = 18,501.28 × 8,102.56
  4. Step 4: Simplify right side
    13,408.80x = 149,907,731.28
  5. Step 5: Solve for x
    x = 149,907,731.28/13,408.80
  6. Step 6: Final answer
    x = 11,179.80

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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.