Home / 21,429.82-32,145.64-6,639.01

Finding the Fourth Proportional to 21,429.82, 32,145.64 and 6,639.01

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Solution

The fourth proportional to 21,429.82, 32,145.64 and 6,639.01 is: 9,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.82 : 32,145.64 = 6,639.01 : x
  2. Step 2: Convert to fraction form
    21,429.82/32,145.64 = 6,639.01/x
  3. Step 3: Cross multiply
    21,429.82x = 32,145.64 × 6,639.01
  4. Step 4: Simplify right side
    21,429.82x = 213,415,346.62
  5. Step 5: Solve for x
    x = 213,415,346.62/21,429.82
  6. Step 6: Final answer
    x = 9,958.80

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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.