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Finding the Fourth Proportional to 12,939.03, 19,381.66 and 8,235.77

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Solution

The fourth proportional to 12,939.03, 19,381.66 and 8,235.77 is: 12,336.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.03 : 19,381.66 = 8,235.77 : x
  2. Step 2: Convert to fraction form
    12,939.03/19,381.66 = 8,235.77/x
  3. Step 3: Cross multiply
    12,939.03x = 19,381.66 × 8,235.77
  4. Step 4: Simplify right side
    12,939.03x = 159,622,776.48
  5. Step 5: Solve for x
    x = 159,622,776.48/12,939.03
  6. Step 6: Final answer
    x = 12,336.53

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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.