Home / 8,917.37-13,377.72-3,987.20

Finding the Fourth Proportional to 8,917.37, 13,377.72 and 3,987.20

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Solution

The fourth proportional to 8,917.37, 13,377.72 and 3,987.20 is: 5,981.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917.37 : 13,377.72 = 3,987.20 : x
  2. Step 2: Convert to fraction form
    8,917.37/13,377.72 = 3,987.20/x
  3. Step 3: Cross multiply
    8,917.37x = 13,377.72 × 3,987.20
  4. Step 4: Simplify right side
    8,917.37x = 53,339,645.18
  5. Step 5: Solve for x
    x = 53,339,645.18/8,917.37
  6. Step 6: Final answer
    x = 5,981.54

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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.