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Finding the Fourth Proportional to 21,996.88, 32,996.44 and 6,415.68

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Solution

The fourth proportional to 21,996.88, 32,996.44 and 6,415.68 is: 9,623.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,996.88 : 32,996.44 = 6,415.68 : x
  2. Step 2: Convert to fraction form
    21,996.88/32,996.44 = 6,415.68/x
  3. Step 3: Cross multiply
    21,996.88x = 32,996.44 × 6,415.68
  4. Step 4: Simplify right side
    21,996.88x = 211,694,600.18
  5. Step 5: Solve for x
    x = 211,694,600.18/21,996.88
  6. Step 6: Final answer
    x = 9,623.85

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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.