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Finding the Fourth Proportional to 28,006.89, 42,010.89 and 8,285.43

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Solution

The fourth proportional to 28,006.89, 42,010.89 and 8,285.43 is: 12,428.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,006.89 : 42,010.89 = 8,285.43 : x
  2. Step 2: Convert to fraction form
    28,006.89/42,010.89 = 8,285.43/x
  3. Step 3: Cross multiply
    28,006.89x = 42,010.89 × 8,285.43
  4. Step 4: Simplify right side
    28,006.89x = 348,078,288.33
  5. Step 5: Solve for x
    x = 348,078,288.33/28,006.89
  6. Step 6: Final answer
    x = 12,428.31

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1.5x scale

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.