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Finding the Fourth Proportional to 13,387.98, 18,484.02 and 8,609.98

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Solution

The fourth proportional to 13,387.98, 18,484.02 and 8,609.98 is: 11,887.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.98 : 18,484.02 = 8,609.98 : x
  2. Step 2: Convert to fraction form
    13,387.98/18,484.02 = 8,609.98/x
  3. Step 3: Cross multiply
    13,387.98x = 18,484.02 × 8,609.98
  4. Step 4: Simplify right side
    13,387.98x = 159,147,042.52
  5. Step 5: Solve for x
    x = 159,147,042.52/13,387.98
  6. Step 6: Final answer
    x = 11,887.31

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1.5x scale

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.