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Finding the Fourth Proportional to 21,080.87, 29,092.14 and 11,521.16

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Solution

The fourth proportional to 21,080.87, 29,092.14 and 11,521.16 is: 15,899.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.87 : 29,092.14 = 11,521.16 : x
  2. Step 2: Convert to fraction form
    21,080.87/29,092.14 = 11,521.16/x
  3. Step 3: Cross multiply
    21,080.87x = 29,092.14 × 11,521.16
  4. Step 4: Simplify right side
    21,080.87x = 335,175,054.22
  5. Step 5: Solve for x
    x = 335,175,054.22/21,080.87
  6. Step 6: Final answer
    x = 15,899.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.