Home / 12,879.38-19,328.80-9,425.54

Finding the Fourth Proportional to 12,879.38, 19,328.80 and 9,425.54

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Solution

The fourth proportional to 12,879.38, 19,328.80 and 9,425.54 is: 14,145.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.38 : 19,328.80 = 9,425.54 : x
  2. Step 2: Convert to fraction form
    12,879.38/19,328.80 = 9,425.54/x
  3. Step 3: Cross multiply
    12,879.38x = 19,328.80 × 9,425.54
  4. Step 4: Simplify right side
    12,879.38x = 182,184,377.55
  5. Step 5: Solve for x
    x = 182,184,377.55/12,879.38
  6. Step 6: Final answer
    x = 14,145.43

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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.