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Finding the Fourth Proportional to 12,911.63, 17,817.03 and 7,245.59

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Solution

The fourth proportional to 12,911.63, 17,817.03 and 7,245.59 is: 9,998.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.63 : 17,817.03 = 7,245.59 : x
  2. Step 2: Convert to fraction form
    12,911.63/17,817.03 = 7,245.59/x
  3. Step 3: Cross multiply
    12,911.63x = 17,817.03 × 7,245.59
  4. Step 4: Simplify right side
    12,911.63x = 129,094,805.31
  5. Step 5: Solve for x
    x = 129,094,805.31/12,911.63
  6. Step 6: Final answer
    x = 9,998.34

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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.