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Finding the Fourth Proportional to 28,751.21, 43,035.68 and 20,826.98

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Solution

The fourth proportional to 28,751.21, 43,035.68 and 20,826.98 is: 31,174.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,751.21 : 43,035.68 = 20,826.98 : x
  2. Step 2: Convert to fraction form
    28,751.21/43,035.68 = 20,826.98/x
  3. Step 3: Cross multiply
    28,751.21x = 43,035.68 × 20,826.98
  4. Step 4: Simplify right side
    28,751.21x = 896,302,927.33
  5. Step 5: Solve for x
    x = 896,302,927.33/28,751.21
  6. Step 6: Final answer
    x = 31,174.45

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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.