Home / 12,939.75-19,410.71-3,705.75

Finding the Fourth Proportional to 12,939.75, 19,410.71 and 3,705.75

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Solution

The fourth proportional to 12,939.75, 19,410.71 and 3,705.75 is: 5,558.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.75 : 19,410.71 = 3,705.75 : x
  2. Step 2: Convert to fraction form
    12,939.75/19,410.71 = 3,705.75/x
  3. Step 3: Cross multiply
    12,939.75x = 19,410.71 × 3,705.75
  4. Step 4: Simplify right side
    12,939.75x = 71,931,220.05
  5. Step 5: Solve for x
    x = 71,931,220.05/12,939.75
  6. Step 6: Final answer
    x = 5,558.93

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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.