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Finding the Fourth Proportional to 28,185.42, 42,278.13 and 11,542.42

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Solution

The fourth proportional to 28,185.42, 42,278.13 and 11,542.42 is: 17,313.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185.42 : 42,278.13 = 11,542.42 : x
  2. Step 2: Convert to fraction form
    28,185.42/42,278.13 = 11,542.42/x
  3. Step 3: Cross multiply
    28,185.42x = 42,278.13 × 11,542.42
  4. Step 4: Simplify right side
    28,185.42x = 487,992,072.57
  5. Step 5: Solve for x
    x = 487,992,072.57/28,185.42
  6. Step 6: Final answer
    x = 17,313.64

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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.