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Finding the Fourth Proportional to 11,959.03, 17,931.79 and 5,720.55

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Solution

The fourth proportional to 11,959.03, 17,931.79 and 5,720.55 is: 8,577.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,959.03 : 17,931.79 = 5,720.55 : x
  2. Step 2: Convert to fraction form
    11,959.03/17,931.79 = 5,720.55/x
  3. Step 3: Cross multiply
    11,959.03x = 17,931.79 × 5,720.55
  4. Step 4: Simplify right side
    11,959.03x = 102,579,701.28
  5. Step 5: Solve for x
    x = 102,579,701.28/11,959.03
  6. Step 6: Final answer
    x = 8,577.59

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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.