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Finding the Fourth Proportional to 28,927.71, 43,391.52 and 8,151.21

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Solution

The fourth proportional to 28,927.71, 43,391.52 and 8,151.21 is: 12,226.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,927.71 : 43,391.52 = 8,151.21 : x
  2. Step 2: Convert to fraction form
    28,927.71/43,391.52 = 8,151.21/x
  3. Step 3: Cross multiply
    28,927.71x = 43,391.52 × 8,151.21
  4. Step 4: Simplify right side
    28,927.71x = 353,693,391.74
  5. Step 5: Solve for x
    x = 353,693,391.74/28,927.71
  6. Step 6: Final answer
    x = 12,226.80

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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.