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Finding the Fourth Proportional to 12,909.91, 17,699.65 and 12,676.63

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Solution

The fourth proportional to 12,909.91, 17,699.65 and 12,676.63 is: 17,379.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.91 : 17,699.65 = 12,676.63 : x
  2. Step 2: Convert to fraction form
    12,909.91/17,699.65 = 12,676.63/x
  3. Step 3: Cross multiply
    12,909.91x = 17,699.65 × 12,676.63
  4. Step 4: Simplify right side
    12,909.91x = 224,371,945.87
  5. Step 5: Solve for x
    x = 224,371,945.87/12,909.91
  6. Step 6: Final answer
    x = 17,379.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.