Home / 21,080.68-29,091.18-12,129.88

Finding the Fourth Proportional to 21,080.68, 29,091.18 and 12,129.88

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Solution

The fourth proportional to 21,080.68, 29,091.18 and 12,129.88 is: 16,739.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.68 : 29,091.18 = 12,129.88 : x
  2. Step 2: Convert to fraction form
    21,080.68/29,091.18 = 12,129.88/x
  3. Step 3: Cross multiply
    21,080.68x = 29,091.18 × 12,129.88
  4. Step 4: Simplify right side
    21,080.68x = 352,872,522.46
  5. Step 5: Solve for x
    x = 352,872,522.46/21,080.68
  6. Step 6: Final answer
    x = 16,739.14

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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.