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Finding the Fourth Proportional to 12,995.26, 17,928.42 and 7,328.70

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Solution

The fourth proportional to 12,995.26, 17,928.42 and 7,328.70 is: 10,110.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,995.26 : 17,928.42 = 7,328.70 : x
  2. Step 2: Convert to fraction form
    12,995.26/17,928.42 = 7,328.70/x
  3. Step 3: Cross multiply
    12,995.26x = 17,928.42 × 7,328.70
  4. Step 4: Simplify right side
    12,995.26x = 131,392,011.65
  5. Step 5: Solve for x
    x = 131,392,011.65/12,995.26
  6. Step 6: Final answer
    x = 10,110.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.