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Finding the Fourth Proportional to 21,770.69, 32,670.60 and 7,919.69

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Solution

The fourth proportional to 21,770.69, 32,670.60 and 7,919.69 is: 11,884.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,770.69 : 32,670.60 = 7,919.69 : x
  2. Step 2: Convert to fraction form
    21,770.69/32,670.60 = 7,919.69/x
  3. Step 3: Cross multiply
    21,770.69x = 32,670.60 × 7,919.69
  4. Step 4: Simplify right side
    21,770.69x = 258,740,860.76
  5. Step 5: Solve for x
    x = 258,740,860.76/21,770.69
  6. Step 6: Final answer
    x = 11,884.83

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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.