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Finding the Fourth Proportional to 21,699.81, 32,548.32 and 6,919.32

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Solution

The fourth proportional to 21,699.81, 32,548.32 and 6,919.32 is: 10,378.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,699.81 : 32,548.32 = 6,919.32 : x
  2. Step 2: Convert to fraction form
    21,699.81/32,548.32 = 6,919.32/x
  3. Step 3: Cross multiply
    21,699.81x = 32,548.32 × 6,919.32
  4. Step 4: Simplify right side
    21,699.81x = 225,212,241.54
  5. Step 5: Solve for x
    x = 225,212,241.54/21,699.81
  6. Step 6: Final answer
    x = 10,378.54

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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.