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Finding the Fourth Proportional to 28,035.78, 42,041.46 and 8,040.86

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Solution

The fourth proportional to 28,035.78, 42,041.46 and 8,040.86 is: 12,057.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,035.78 : 42,041.46 = 8,040.86 : x
  2. Step 2: Convert to fraction form
    28,035.78/42,041.46 = 8,040.86/x
  3. Step 3: Cross multiply
    28,035.78x = 42,041.46 × 8,040.86
  4. Step 4: Simplify right side
    28,035.78x = 338,049,283.85
  5. Step 5: Solve for x
    x = 338,049,283.85/28,035.78
  6. Step 6: Final answer
    x = 12,057.78

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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.