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Finding the Fourth Proportional to 21,763.88, 32,655.05 and 11,891.63

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Solution

The fourth proportional to 21,763.88, 32,655.05 and 11,891.63 is: 17,842.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,763.88 : 32,655.05 = 11,891.63 : x
  2. Step 2: Convert to fraction form
    21,763.88/32,655.05 = 11,891.63/x
  3. Step 3: Cross multiply
    21,763.88x = 32,655.05 × 11,891.63
  4. Step 4: Simplify right side
    21,763.88x = 388,321,761.14
  5. Step 5: Solve for x
    x = 388,321,761.14/21,763.88
  6. Step 6: Final answer
    x = 17,842.48

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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.