Home / 21,080.70-29,090.58-12,129.59

Finding the Fourth Proportional to 21,080.70, 29,090.58 and 12,129.59

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Solution

The fourth proportional to 21,080.70, 29,090.58 and 12,129.59 is: 16,738.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.70 : 29,090.58 = 12,129.59 : x
  2. Step 2: Convert to fraction form
    21,080.70/29,090.58 = 12,129.59/x
  3. Step 3: Cross multiply
    21,080.70x = 29,090.58 × 12,129.59
  4. Step 4: Simplify right side
    21,080.70x = 352,856,662.81
  5. Step 5: Solve for x
    x = 352,856,662.81/21,080.70
  6. Step 6: Final answer
    x = 16,738.38

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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.