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Finding the Fourth Proportional to 13,387.91, 18,483.98 and 8,610

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Solution

The fourth proportional to 13,387.91, 18,483.98 and 8,610 is: 11,887.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.91 : 18,483.98 = 8,610 : x
  2. Step 2: Convert to fraction form
    13,387.91/18,483.98 = 8,610/x
  3. Step 3: Cross multiply
    13,387.91x = 18,483.98 × 8,610
  4. Step 4: Simplify right side
    13,387.91x = 159,147,067.80
  5. Step 5: Solve for x
    x = 159,147,067.80/13,387.91
  6. Step 6: Final answer
    x = 11,887.37

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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.