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Finding the Fourth Proportional to 7,730, 11,579.64 and 3,822.48

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Solution

The fourth proportional to 7,730, 11,579.64 and 3,822.48 is: 5,726.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,730 : 11,579.64 = 3,822.48 : x
  2. Step 2: Convert to fraction form
    7,730/11,579.64 = 3,822.48/x
  3. Step 3: Cross multiply
    7,730x = 11,579.64 × 3,822.48
  4. Step 4: Simplify right side
    7,730x = 44,262,942.31
  5. Step 5: Solve for x
    x = 44,262,942.31/7,730
  6. Step 6: Final answer
    x = 5,726.12

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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.