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Finding the Fourth Proportional to 12,672.72, 17,487.64 and 7,007.12

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Solution

The fourth proportional to 12,672.72, 17,487.64 and 7,007.12 is: 9,669.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.72 : 17,487.64 = 7,007.12 : x
  2. Step 2: Convert to fraction form
    12,672.72/17,487.64 = 7,007.12/x
  3. Step 3: Cross multiply
    12,672.72x = 17,487.64 × 7,007.12
  4. Step 4: Simplify right side
    12,672.72x = 122,537,992.00
  5. Step 5: Solve for x
    x = 122,537,992.00/12,672.72
  6. Step 6: Final answer
    x = 9,669.43

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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.