Home / 21,080.16-29,090.48-12,129.39

Finding the Fourth Proportional to 21,080.16, 29,090.48 and 12,129.39

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Solution

The fourth proportional to 21,080.16, 29,090.48 and 12,129.39 is: 16,738.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.16 : 29,090.48 = 12,129.39 : x
  2. Step 2: Convert to fraction form
    21,080.16/29,090.48 = 12,129.39/x
  3. Step 3: Cross multiply
    21,080.16x = 29,090.48 × 12,129.39
  4. Step 4: Simplify right side
    21,080.16x = 352,849,716.56
  5. Step 5: Solve for x
    x = 352,849,716.56/21,080.16
  6. Step 6: Final answer
    x = 16,738.47

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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.