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Finding the Fourth Proportional to 12,879.95, 19,317.02 and 8,133.84

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Solution

The fourth proportional to 12,879.95, 19,317.02 and 8,133.84 is: 12,198.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.95 : 19,317.02 = 8,133.84 : x
  2. Step 2: Convert to fraction form
    12,879.95/19,317.02 = 8,133.84/x
  3. Step 3: Cross multiply
    12,879.95x = 19,317.02 × 8,133.84
  4. Step 4: Simplify right side
    12,879.95x = 157,121,509.29
  5. Step 5: Solve for x
    x = 157,121,509.29/12,879.95
  6. Step 6: Final answer
    x = 12,198.93

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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.