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Finding the Fourth Proportional to 7,762.80, 11,621.28 and 5,125.44

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Solution

The fourth proportional to 7,762.80, 11,621.28 and 5,125.44 is: 7,673.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,762.80 : 11,621.28 = 5,125.44 : x
  2. Step 2: Convert to fraction form
    7,762.80/11,621.28 = 5,125.44/x
  3. Step 3: Cross multiply
    7,762.80x = 11,621.28 × 5,125.44
  4. Step 4: Simplify right side
    7,762.80x = 59,564,173.36
  5. Step 5: Solve for x
    x = 59,564,173.36/7,762.80
  6. Step 6: Final answer
    x = 7,673.03

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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.