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Finding the Fourth Proportional to 28,412.87, 42,619.29 and 7,636.37

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Solution

The fourth proportional to 28,412.87, 42,619.29 and 7,636.37 is: 11,454.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.87 : 42,619.29 = 7,636.37 : x
  2. Step 2: Convert to fraction form
    28,412.87/42,619.29 = 7,636.37/x
  3. Step 3: Cross multiply
    28,412.87x = 42,619.29 × 7,636.37
  4. Step 4: Simplify right side
    28,412.87x = 325,456,667.58
  5. Step 5: Solve for x
    x = 325,456,667.58/28,412.87
  6. Step 6: Final answer
    x = 11,454.55

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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.