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Finding the Fourth Proportional to 28,305.48, 42,455.48 and 8,584.20

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Solution

The fourth proportional to 28,305.48, 42,455.48 and 8,584.20 is: 12,875.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.48 : 42,455.48 = 8,584.20 : x
  2. Step 2: Convert to fraction form
    28,305.48/42,455.48 = 8,584.20/x
  3. Step 3: Cross multiply
    28,305.48x = 42,455.48 × 8,584.20
  4. Step 4: Simplify right side
    28,305.48x = 364,446,444.12
  5. Step 5: Solve for x
    x = 364,446,444.12/28,305.48
  6. Step 6: Final answer
    x = 12,875.48

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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.