Home / 20,878.36-31,325.74-9,183.38

Finding the Fourth Proportional to 20,878.36, 31,325.74 and 9,183.38

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Solution

The fourth proportional to 20,878.36, 31,325.74 and 9,183.38 is: 13,778.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.36 : 31,325.74 = 9,183.38 : x
  2. Step 2: Convert to fraction form
    20,878.36/31,325.74 = 9,183.38/x
  3. Step 3: Cross multiply
    20,878.36x = 31,325.74 × 9,183.38
  4. Step 4: Simplify right side
    20,878.36x = 287,675,994.61
  5. Step 5: Solve for x
    x = 287,675,994.61/20,878.36
  6. Step 6: Final answer
    x = 13,778.67

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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.