Home / 13,137.45-18,135.81-8,424.42

Finding the Fourth Proportional to 13,137.45, 18,135.81 and 8,424.42

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Solution

The fourth proportional to 13,137.45, 18,135.81 and 8,424.42 is: 11,629.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.45 : 18,135.81 = 8,424.42 : x
  2. Step 2: Convert to fraction form
    13,137.45/18,135.81 = 8,424.42/x
  3. Step 3: Cross multiply
    13,137.45x = 18,135.81 × 8,424.42
  4. Step 4: Simplify right side
    13,137.45x = 152,783,680.48
  5. Step 5: Solve for x
    x = 152,783,680.48/13,137.45
  6. Step 6: Final answer
    x = 11,629.63

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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.