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Finding the Fourth Proportional to 28,466.71, 42,709.21 and 13,676.72

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Solution

The fourth proportional to 28,466.71, 42,709.21 and 13,676.72 is: 20,519.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,466.71 : 42,709.21 = 13,676.72 : x
  2. Step 2: Convert to fraction form
    28,466.71/42,709.21 = 13,676.72/x
  3. Step 3: Cross multiply
    28,466.71x = 42,709.21 × 13,676.72
  4. Step 4: Simplify right side
    28,466.71x = 584,121,658.85
  5. Step 5: Solve for x
    x = 584,121,658.85/28,466.71
  6. Step 6: Final answer
    x = 20,519.47

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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.