Home / 20,102.12-27,740.90-11,150.98

Finding the Fourth Proportional to 20,102.12, 27,740.90 and 11,150.98

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Solution

The fourth proportional to 20,102.12, 27,740.90 and 11,150.98 is: 15,388.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.12 : 27,740.90 = 11,150.98 : x
  2. Step 2: Convert to fraction form
    20,102.12/27,740.90 = 11,150.98/x
  3. Step 3: Cross multiply
    20,102.12x = 27,740.90 × 11,150.98
  4. Step 4: Simplify right side
    20,102.12x = 309,338,221.08
  5. Step 5: Solve for x
    x = 309,338,221.08/20,102.12
  6. Step 6: Final answer
    x = 15,388.34

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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.