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Finding the Fourth Proportional to 18,995.31, 28,490.84 and 7,300.33

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Solution

The fourth proportional to 18,995.31, 28,490.84 and 7,300.33 is: 10,949.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.31 : 28,490.84 = 7,300.33 : x
  2. Step 2: Convert to fraction form
    18,995.31/28,490.84 = 7,300.33/x
  3. Step 3: Cross multiply
    18,995.31x = 28,490.84 × 7,300.33
  4. Step 4: Simplify right side
    18,995.31x = 207,992,453.62
  5. Step 5: Solve for x
    x = 207,992,453.62/18,995.31
  6. Step 6: Final answer
    x = 10,949.67

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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.