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Finding the Fourth Proportional to 7,800, 10,764 and 5,006.08

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Solution

The fourth proportional to 7,800, 10,764 and 5,006.08 is: 6,908.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,800 : 10,764 = 5,006.08 : x
  2. Step 2: Convert to fraction form
    7,800/10,764 = 5,006.08/x
  3. Step 3: Cross multiply
    7,800x = 10,764 × 5,006.08
  4. Step 4: Simplify right side
    7,800x = 53,885,445.12
  5. Step 5: Solve for x
    x = 53,885,445.12/7,800
  6. Step 6: Final answer
    x = 6,908.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.