Home / 28,193.85-38,889.81-18,135.36

Finding the Fourth Proportional to 28,193.85, 38,889.81 and 18,135.36

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Solution

The fourth proportional to 28,193.85, 38,889.81 and 18,135.36 is: 25,015.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,193.85 : 38,889.81 = 18,135.36 : x
  2. Step 2: Convert to fraction form
    28,193.85/38,889.81 = 18,135.36/x
  3. Step 3: Cross multiply
    28,193.85x = 38,889.81 × 18,135.36
  4. Step 4: Simplify right side
    28,193.85x = 705,280,704.68
  5. Step 5: Solve for x
    x = 705,280,704.68/28,193.85
  6. Step 6: Final answer
    x = 25,015.41

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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.