Home / 12,917.70-19,378.29-4,155.30

Finding the Fourth Proportional to 12,917.70, 19,378.29 and 4,155.30

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Solution

The fourth proportional to 12,917.70, 19,378.29 and 4,155.30 is: 6,233.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,917.70 : 19,378.29 = 4,155.30 : x
  2. Step 2: Convert to fraction form
    12,917.70/19,378.29 = 4,155.30/x
  3. Step 3: Cross multiply
    12,917.70x = 19,378.29 × 4,155.30
  4. Step 4: Simplify right side
    12,917.70x = 80,522,608.44
  5. Step 5: Solve for x
    x = 80,522,608.44/12,917.70
  6. Step 6: Final answer
    x = 6,233.51

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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.