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Finding the Fourth Proportional to 12,003.72, 18,005.89 and 7,076.89

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Solution

The fourth proportional to 12,003.72, 18,005.89 and 7,076.89 is: 10,615.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,003.72 : 18,005.89 = 7,076.89 : x
  2. Step 2: Convert to fraction form
    12,003.72/18,005.89 = 7,076.89/x
  3. Step 3: Cross multiply
    12,003.72x = 18,005.89 × 7,076.89
  4. Step 4: Simplify right side
    12,003.72x = 127,425,702.88
  5. Step 5: Solve for x
    x = 127,425,702.88/12,003.72
  6. Step 6: Final answer
    x = 10,615.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.