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Finding the Fourth Proportional to 12,939.44, 19,409.16 and 10,330.16

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Solution

The fourth proportional to 12,939.44, 19,409.16 and 10,330.16 is: 15,495.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.44 : 19,409.16 = 10,330.16 : x
  2. Step 2: Convert to fraction form
    12,939.44/19,409.16 = 10,330.16/x
  3. Step 3: Cross multiply
    12,939.44x = 19,409.16 × 10,330.16
  4. Step 4: Simplify right side
    12,939.44x = 200,499,728.27
  5. Step 5: Solve for x
    x = 200,499,728.27/12,939.44
  6. Step 6: Final answer
    x = 15,495.24

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Similar ratio
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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.