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Finding the Fourth Proportional to 11,810.57, 17,718.54 and 3,489.89

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Solution

The fourth proportional to 11,810.57, 17,718.54 and 3,489.89 is: 5,235.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,810.57 : 17,718.54 = 3,489.89 : x
  2. Step 2: Convert to fraction form
    11,810.57/17,718.54 = 3,489.89/x
  3. Step 3: Cross multiply
    11,810.57x = 17,718.54 × 3,489.89
  4. Step 4: Simplify right side
    11,810.57x = 61,835,738.16
  5. Step 5: Solve for x
    x = 61,835,738.16/11,810.57
  6. Step 6: Final answer
    x = 5,235.63

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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.