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Finding the Fourth Proportional to 28,427.68, 42,626.44 and 8,700.94

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Solution

The fourth proportional to 28,427.68, 42,626.44 and 8,700.94 is: 13,046.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.68 : 42,626.44 = 8,700.94 : x
  2. Step 2: Convert to fraction form
    28,427.68/42,626.44 = 8,700.94/x
  3. Step 3: Cross multiply
    28,427.68x = 42,626.44 × 8,700.94
  4. Step 4: Simplify right side
    28,427.68x = 370,889,968.54
  5. Step 5: Solve for x
    x = 370,889,968.54/28,427.68
  6. Step 6: Final answer
    x = 13,046.79

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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.