Home / 11,438.40-17,161.55-4,778.45

Finding the Fourth Proportional to 11,438.40, 17,161.55 and 4,778.45

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Solution

The fourth proportional to 11,438.40, 17,161.55 and 4,778.45 is: 7,169.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,438.40 : 17,161.55 = 4,778.45 : x
  2. Step 2: Convert to fraction form
    11,438.40/17,161.55 = 4,778.45/x
  3. Step 3: Cross multiply
    11,438.40x = 17,161.55 × 4,778.45
  4. Step 4: Simplify right side
    11,438.40x = 82,005,608.60
  5. Step 5: Solve for x
    x = 82,005,608.60/11,438.40
  6. Step 6: Final answer
    x = 7,169.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.