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Finding the Fourth Proportional to 7,871.20, 11,806.82 and 1,948.06

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Solution

The fourth proportional to 7,871.20, 11,806.82 and 1,948.06 is: 2,922.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.20 : 11,806.82 = 1,948.06 : x
  2. Step 2: Convert to fraction form
    7,871.20/11,806.82 = 1,948.06/x
  3. Step 3: Cross multiply
    7,871.20x = 11,806.82 × 1,948.06
  4. Step 4: Simplify right side
    7,871.20x = 23,000,393.77
  5. Step 5: Solve for x
    x = 23,000,393.77/7,871.20
  6. Step 6: Final answer
    x = 2,922.09

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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.