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Finding the Fourth Proportional to 28,410.64, 42,620.74 and 8,684.58

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Solution

The fourth proportional to 28,410.64, 42,620.74 and 8,684.58 is: 13,028.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,410.64 : 42,620.74 = 8,684.58 : x
  2. Step 2: Convert to fraction form
    28,410.64/42,620.74 = 8,684.58/x
  3. Step 3: Cross multiply
    28,410.64x = 42,620.74 × 8,684.58
  4. Step 4: Simplify right side
    28,410.64x = 370,143,364.31
  5. Step 5: Solve for x
    x = 370,143,364.31/28,410.64
  6. Step 6: Final answer
    x = 13,028.34

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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.