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Finding the Fourth Proportional to 21,959.48, 32,940.58 and 7,169.96

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Solution

The fourth proportional to 21,959.48, 32,940.58 and 7,169.96 is: 10,755.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.48 : 32,940.58 = 7,169.96 : x
  2. Step 2: Convert to fraction form
    21,959.48/32,940.58 = 7,169.96/x
  3. Step 3: Cross multiply
    21,959.48x = 32,940.58 × 7,169.96
  4. Step 4: Simplify right side
    21,959.48x = 236,182,640.98
  5. Step 5: Solve for x
    x = 236,182,640.98/21,959.48
  6. Step 6: Final answer
    x = 10,755.38

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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.