Home / 21,080.68-29,104.79-13,134.58

Finding the Fourth Proportional to 21,080.68, 29,104.79 and 13,134.58

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Solution

The fourth proportional to 21,080.68, 29,104.79 and 13,134.58 is: 18,134.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.68 : 29,104.79 = 13,134.58 : x
  2. Step 2: Convert to fraction form
    21,080.68/29,104.79 = 13,134.58/x
  3. Step 3: Cross multiply
    21,080.68x = 29,104.79 × 13,134.58
  4. Step 4: Simplify right side
    21,080.68x = 382,279,054.20
  5. Step 5: Solve for x
    x = 382,279,054.20/21,080.68
  6. Step 6: Final answer
    x = 18,134.10

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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.