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Finding the Fourth Proportional to 13,675.55, 20,521.96 and 7,843.55

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Solution

The fourth proportional to 13,675.55, 20,521.96 and 7,843.55 is: 11,770.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,675.55 : 20,521.96 = 7,843.55 : x
  2. Step 2: Convert to fraction form
    13,675.55/20,521.96 = 7,843.55/x
  3. Step 3: Cross multiply
    13,675.55x = 20,521.96 × 7,843.55
  4. Step 4: Simplify right side
    13,675.55x = 160,964,897.14
  5. Step 5: Solve for x
    x = 160,964,897.14/13,675.55
  6. Step 6: Final answer
    x = 11,770.27

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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.