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Finding the Fourth Proportional to 11,720.61, 17,581.04 and 2,955.52

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Solution

The fourth proportional to 11,720.61, 17,581.04 and 2,955.52 is: 4,433.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.61 : 17,581.04 = 2,955.52 : x
  2. Step 2: Convert to fraction form
    11,720.61/17,581.04 = 2,955.52/x
  3. Step 3: Cross multiply
    11,720.61x = 17,581.04 × 2,955.52
  4. Step 4: Simplify right side
    11,720.61x = 51,961,133.62
  5. Step 5: Solve for x
    x = 51,961,133.62/11,720.61
  6. Step 6: Final answer
    x = 4,433.31

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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.