Home / 12,683.70-18,933.89-11,128.50

Finding the Fourth Proportional to 12,683.70, 18,933.89 and 11,128.50

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Solution

The fourth proportional to 12,683.70, 18,933.89 and 11,128.50 is: 16,612.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,683.70 : 18,933.89 = 11,128.50 : x
  2. Step 2: Convert to fraction form
    12,683.70/18,933.89 = 11,128.50/x
  3. Step 3: Cross multiply
    12,683.70x = 18,933.89 × 11,128.50
  4. Step 4: Simplify right side
    12,683.70x = 210,705,794.87
  5. Step 5: Solve for x
    x = 210,705,794.87/12,683.70
  6. Step 6: Final answer
    x = 16,612.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.