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Finding the Fourth Proportional to 28,927.80, 43,391.70 and 8,151.30

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Solution

The fourth proportional to 28,927.80, 43,391.70 and 8,151.30 is: 12,226.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,927.80 : 43,391.70 = 8,151.30 : x
  2. Step 2: Convert to fraction form
    28,927.80/43,391.70 = 8,151.30/x
  3. Step 3: Cross multiply
    28,927.80x = 43,391.70 × 8,151.30
  4. Step 4: Simplify right side
    28,927.80x = 353,698,764.21
  5. Step 5: Solve for x
    x = 353,698,764.21/28,927.80
  6. Step 6: Final answer
    x = 12,226.95

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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.