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Finding the Fourth Proportional to 7,879.88, 11,807.91 and 4,756.41

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Solution

The fourth proportional to 7,879.88, 11,807.91 and 4,756.41 is: 7,127.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.88 : 11,807.91 = 4,756.41 : x
  2. Step 2: Convert to fraction form
    7,879.88/11,807.91 = 4,756.41/x
  3. Step 3: Cross multiply
    7,879.88x = 11,807.91 × 4,756.41
  4. Step 4: Simplify right side
    7,879.88x = 56,163,261.20
  5. Step 5: Solve for x
    x = 56,163,261.20/7,879.88
  6. Step 6: Final answer
    x = 7,127.42

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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.