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Finding the Fourth Proportional to 21,815.88, 32,720.70 and 7,022.92

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Solution

The fourth proportional to 21,815.88, 32,720.70 and 7,022.92 is: 10,533.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,815.88 : 32,720.70 = 7,022.92 : x
  2. Step 2: Convert to fraction form
    21,815.88/32,720.70 = 7,022.92/x
  3. Step 3: Cross multiply
    21,815.88x = 32,720.70 × 7,022.92
  4. Step 4: Simplify right side
    21,815.88x = 229,794,858.44
  5. Step 5: Solve for x
    x = 229,794,858.44/21,815.88
  6. Step 6: Final answer
    x = 10,533.38

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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.