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Finding the Fourth Proportional to 12,808.92, 19,211.80 and 3,449.67

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Solution

The fourth proportional to 12,808.92, 19,211.80 and 3,449.67 is: 5,174.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.92 : 19,211.80 = 3,449.67 : x
  2. Step 2: Convert to fraction form
    12,808.92/19,211.80 = 3,449.67/x
  3. Step 3: Cross multiply
    12,808.92x = 19,211.80 × 3,449.67
  4. Step 4: Simplify right side
    12,808.92x = 66,274,370.11
  5. Step 5: Solve for x
    x = 66,274,370.11/12,808.92
  6. Step 6: Final answer
    x = 5,174.08

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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.