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Finding the Fourth Proportional to 28,325.66, 42,490.88 and 8,604.39

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Solution

The fourth proportional to 28,325.66, 42,490.88 and 8,604.39 is: 12,907.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,325.66 : 42,490.88 = 8,604.39 : x
  2. Step 2: Convert to fraction form
    28,325.66/42,490.88 = 8,604.39/x
  3. Step 3: Cross multiply
    28,325.66x = 42,490.88 × 8,604.39
  4. Step 4: Simplify right side
    28,325.66x = 365,608,059.94
  5. Step 5: Solve for x
    x = 365,608,059.94/28,325.66
  6. Step 6: Final answer
    x = 12,907.31

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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.