Home / 21,080.43-29,090.18-12,130.81

Finding the Fourth Proportional to 21,080.43, 29,090.18 and 12,130.81

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Solution

The fourth proportional to 21,080.43, 29,090.18 and 12,130.81 is: 16,740.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.43 : 29,090.18 = 12,130.81 : x
  2. Step 2: Convert to fraction form
    21,080.43/29,090.18 = 12,130.81/x
  3. Step 3: Cross multiply
    21,080.43x = 29,090.18 × 12,130.81
  4. Step 4: Simplify right side
    21,080.43x = 352,887,404.05
  5. Step 5: Solve for x
    x = 352,887,404.05/21,080.43
  6. Step 6: Final answer
    x = 16,740.05

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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.