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Finding the Fourth Proportional to 18,819.26, 28,235.06 and 7,731.17

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Solution

The fourth proportional to 18,819.26, 28,235.06 and 7,731.17 is: 11,599.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.26 : 28,235.06 = 7,731.17 : x
  2. Step 2: Convert to fraction form
    18,819.26/28,235.06 = 7,731.17/x
  3. Step 3: Cross multiply
    18,819.26x = 28,235.06 × 7,731.17
  4. Step 4: Simplify right side
    18,819.26x = 218,290,048.82
  5. Step 5: Solve for x
    x = 218,290,048.82/18,819.26
  6. Step 6: Final answer
    x = 11,599.29

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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.