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Finding the Fourth Proportional to 28,185.88, 42,278.88 and 8,464.36

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Solution

The fourth proportional to 28,185.88, 42,278.88 and 8,464.36 is: 12,696.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185.88 : 42,278.88 = 8,464.36 : x
  2. Step 2: Convert to fraction form
    28,185.88/42,278.88 = 8,464.36/x
  3. Step 3: Cross multiply
    28,185.88x = 42,278.88 × 8,464.36
  4. Step 4: Simplify right side
    28,185.88x = 357,863,660.72
  5. Step 5: Solve for x
    x = 357,863,660.72/28,185.88
  6. Step 6: Final answer
    x = 12,696.56

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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.