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Finding the Fourth Proportional to 12,939.32, 19,393.29 and 9,185.19

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Solution

The fourth proportional to 12,939.32, 19,393.29 and 9,185.19 is: 13,766.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.32 : 19,393.29 = 9,185.19 : x
  2. Step 2: Convert to fraction form
    12,939.32/19,393.29 = 9,185.19/x
  3. Step 3: Cross multiply
    12,939.32x = 19,393.29 × 9,185.19
  4. Step 4: Simplify right side
    12,939.32x = 178,131,053.38
  5. Step 5: Solve for x
    x = 178,131,053.38/12,939.32
  6. Step 6: Final answer
    x = 13,766.65

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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.