Home / 21,809.20-32,728.12-11,955.36

Finding the Fourth Proportional to 21,809.20, 32,728.12 and 11,955.36

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Solution

The fourth proportional to 21,809.20, 32,728.12 and 11,955.36 is: 17,940.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809.20 : 32,728.12 = 11,955.36 : x
  2. Step 2: Convert to fraction form
    21,809.20/32,728.12 = 11,955.36/x
  3. Step 3: Cross multiply
    21,809.20x = 32,728.12 × 11,955.36
  4. Step 4: Simplify right side
    21,809.20x = 391,276,456.72
  5. Step 5: Solve for x
    x = 391,276,456.72/21,809.20
  6. Step 6: Final answer
    x = 17,940.89

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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.