Home / 12,909.92-19,364.94-4,145.31

Finding the Fourth Proportional to 12,909.92, 19,364.94 and 4,145.31

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Solution

The fourth proportional to 12,909.92, 19,364.94 and 4,145.31 is: 6,217.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.92 : 19,364.94 = 4,145.31 : x
  2. Step 2: Convert to fraction form
    12,909.92/19,364.94 = 4,145.31/x
  3. Step 3: Cross multiply
    12,909.92x = 19,364.94 × 4,145.31
  4. Step 4: Simplify right side
    12,909.92x = 80,273,679.43
  5. Step 5: Solve for x
    x = 80,273,679.43/12,909.92
  6. Step 6: Final answer
    x = 6,217.99

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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.