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Finding the Fourth Proportional to 12,553, 18,829.88 and 3,319

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Solution

The fourth proportional to 12,553, 18,829.88 and 3,319 is: 4,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,553 : 18,829.88 = 3,319 : x
  2. Step 2: Convert to fraction form
    12,553/18,829.88 = 3,319/x
  3. Step 3: Cross multiply
    12,553x = 18,829.88 × 3,319
  4. Step 4: Simplify right side
    12,553x = 62,496,371.72
  5. Step 5: Solve for x
    x = 62,496,371.72/12,553
  6. Step 6: Final answer
    x = 4,978.60

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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.