Home / 20,342.10-30,518.02-8,489.28

Finding the Fourth Proportional to 20,342.10, 30,518.02 and 8,489.28

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Solution

The fourth proportional to 20,342.10, 30,518.02 and 8,489.28 is: 12,735.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.10 : 30,518.02 = 8,489.28 : x
  2. Step 2: Convert to fraction form
    20,342.10/30,518.02 = 8,489.28/x
  3. Step 3: Cross multiply
    20,342.10x = 30,518.02 × 8,489.28
  4. Step 4: Simplify right side
    20,342.10x = 259,076,027.44
  5. Step 5: Solve for x
    x = 259,076,027.44/20,342.10
  6. Step 6: Final answer
    x = 12,735.95

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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.