Home / 8,111.20-12,159.60-4,820.80

Finding the Fourth Proportional to 8,111.20, 12,159.60 and 4,820.80

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Solution

The fourth proportional to 8,111.20, 12,159.60 and 4,820.80 is: 7,226.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,111.20 : 12,159.60 = 4,820.80 : x
  2. Step 2: Convert to fraction form
    8,111.20/12,159.60 = 4,820.80/x
  3. Step 3: Cross multiply
    8,111.20x = 12,159.60 × 4,820.80
  4. Step 4: Simplify right side
    8,111.20x = 58,618,999.68
  5. Step 5: Solve for x
    x = 58,618,999.68/8,111.20
  6. Step 6: Final answer
    x = 7,226.92

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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.