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Finding the Fourth Proportional to 11,782.03, 17,672.59 and 3,990.85

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Solution

The fourth proportional to 11,782.03, 17,672.59 and 3,990.85 is: 5,986.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,782.03 : 17,672.59 = 3,990.85 : x
  2. Step 2: Convert to fraction form
    11,782.03/17,672.59 = 3,990.85/x
  3. Step 3: Cross multiply
    11,782.03x = 17,672.59 × 3,990.85
  4. Step 4: Simplify right side
    11,782.03x = 70,528,557.46
  5. Step 5: Solve for x
    x = 70,528,557.46/11,782.03
  6. Step 6: Final answer
    x = 5,986.11

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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.