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Finding the Fourth Proportional to 21,921.72, 32,884.74 and 6,126.72

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Solution

The fourth proportional to 21,921.72, 32,884.74 and 6,126.72 is: 9,190.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.72 : 32,884.74 = 6,126.72 : x
  2. Step 2: Convert to fraction form
    21,921.72/32,884.74 = 6,126.72/x
  3. Step 3: Cross multiply
    21,921.72x = 32,884.74 × 6,126.72
  4. Step 4: Simplify right side
    21,921.72x = 201,475,594.25
  5. Step 5: Solve for x
    x = 201,475,594.25/21,921.72
  6. Step 6: Final answer
    x = 9,190.68

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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.