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Finding the Fourth Proportional to 12,879.82, 19,302.17 and 7,883.93

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Solution

The fourth proportional to 12,879.82, 19,302.17 and 7,883.93 is: 11,815.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.82 : 19,302.17 = 7,883.93 : x
  2. Step 2: Convert to fraction form
    12,879.82/19,302.17 = 7,883.93/x
  3. Step 3: Cross multiply
    12,879.82x = 19,302.17 × 7,883.93
  4. Step 4: Simplify right side
    12,879.82x = 152,176,965.96
  5. Step 5: Solve for x
    x = 152,176,965.96/12,879.82
  6. Step 6: Final answer
    x = 11,815.15

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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.