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Finding the Fourth Proportional to 28,428.88, 39,234.72 and 16,494.88

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Solution

The fourth proportional to 28,428.88, 39,234.72 and 16,494.88 is: 22,764.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.88 : 39,234.72 = 16,494.88 : x
  2. Step 2: Convert to fraction form
    28,428.88/39,234.72 = 16,494.88/x
  3. Step 3: Cross multiply
    28,428.88x = 39,234.72 × 16,494.88
  4. Step 4: Simplify right side
    28,428.88x = 647,171,998.23
  5. Step 5: Solve for x
    x = 647,171,998.23/28,428.88
  6. Step 6: Final answer
    x = 22,764.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.