Home / 20,080.80-27,712.98-11,129.10

Finding the Fourth Proportional to 20,080.80, 27,712.98 and 11,129.10

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Solution

The fourth proportional to 20,080.80, 27,712.98 and 11,129.10 is: 15,358.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.80 : 27,712.98 = 11,129.10 : x
  2. Step 2: Convert to fraction form
    20,080.80/27,712.98 = 11,129.10/x
  3. Step 3: Cross multiply
    20,080.80x = 27,712.98 × 11,129.10
  4. Step 4: Simplify right side
    20,080.80x = 308,420,525.72
  5. Step 5: Solve for x
    x = 308,420,525.72/20,080.80
  6. Step 6: Final answer
    x = 15,358.98

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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.