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Finding the Fourth Proportional to 12,979.08, 19,468.80 and 3,745.08

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Solution

The fourth proportional to 12,979.08, 19,468.80 and 3,745.08 is: 5,617.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.08 : 19,468.80 = 3,745.08 : x
  2. Step 2: Convert to fraction form
    12,979.08/19,468.80 = 3,745.08/x
  3. Step 3: Cross multiply
    12,979.08x = 19,468.80 × 3,745.08
  4. Step 4: Simplify right side
    12,979.08x = 72,912,213.50
  5. Step 5: Solve for x
    x = 72,912,213.50/12,979.08
  6. Step 6: Final answer
    x = 5,617.67

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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.