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Finding the Fourth Proportional to 28,010.92, 42,010.38 and 8,289.64

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Solution

The fourth proportional to 28,010.92, 42,010.38 and 8,289.64 is: 12,432.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,010.92 : 42,010.38 = 8,289.64 : x
  2. Step 2: Convert to fraction form
    28,010.92/42,010.38 = 8,289.64/x
  3. Step 3: Cross multiply
    28,010.92x = 42,010.38 × 8,289.64
  4. Step 4: Simplify right side
    28,010.92x = 348,250,926.46
  5. Step 5: Solve for x
    x = 348,250,926.46/28,010.92
  6. Step 6: Final answer
    x = 12,432.68

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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.