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Finding the Fourth Proportional to 28,662.88, 42,968.67 and 11,128.54

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Solution

The fourth proportional to 28,662.88, 42,968.67 and 11,128.54 is: 16,682.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,662.88 : 42,968.67 = 11,128.54 : x
  2. Step 2: Convert to fraction form
    28,662.88/42,968.67 = 11,128.54/x
  3. Step 3: Cross multiply
    28,662.88x = 42,968.67 × 11,128.54
  4. Step 4: Simplify right side
    28,662.88x = 478,178,562.84
  5. Step 5: Solve for x
    x = 478,178,562.84/28,662.88
  6. Step 6: Final answer
    x = 16,682.85

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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.