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Finding the Fourth Proportional to 6,486.81, 8,940.29 and 5,231.85

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Solution

The fourth proportional to 6,486.81, 8,940.29 and 5,231.85 is: 7,210.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,486.81 : 8,940.29 = 5,231.85 : x
  2. Step 2: Convert to fraction form
    6,486.81/8,940.29 = 5,231.85/x
  3. Step 3: Cross multiply
    6,486.81x = 8,940.29 × 5,231.85
  4. Step 4: Simplify right side
    6,486.81x = 46,774,230.08
  5. Step 5: Solve for x
    x = 46,774,230.08/6,486.81
  6. Step 6: Final answer
    x = 7,210.67

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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.