Home / 8,051.20-12,076.80-4,979.20

Finding the Fourth Proportional to 8,051.20, 12,076.80 and 4,979.20

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Solution

The fourth proportional to 8,051.20, 12,076.80 and 4,979.20 is: 7,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,051.20 : 12,076.80 = 4,979.20 : x
  2. Step 2: Convert to fraction form
    8,051.20/12,076.80 = 4,979.20/x
  3. Step 3: Cross multiply
    8,051.20x = 12,076.80 × 4,979.20
  4. Step 4: Simplify right side
    8,051.20x = 60,132,802.56
  5. Step 5: Solve for x
    x = 60,132,802.56/8,051.20
  6. Step 6: Final answer
    x = 7,468.80

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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.