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Finding the Fourth Proportional to 28,305.56, 42,461.04 and 8,580.72

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Solution

The fourth proportional to 28,305.56, 42,461.04 and 8,580.72 is: 12,871.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.56 : 42,461.04 = 8,580.72 : x
  2. Step 2: Convert to fraction form
    28,305.56/42,461.04 = 8,580.72/x
  3. Step 3: Cross multiply
    28,305.56x = 42,461.04 × 8,580.72
  4. Step 4: Simplify right side
    28,305.56x = 364,346,295.15
  5. Step 5: Solve for x
    x = 364,346,295.15/28,305.56
  6. Step 6: Final answer
    x = 12,871.90

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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.