Home / 20,109.16-27,749.69-11,157.35

Finding the Fourth Proportional to 20,109.16, 27,749.69 and 11,157.35

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Solution

The fourth proportional to 20,109.16, 27,749.69 and 11,157.35 is: 15,396.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.16 : 27,749.69 = 11,157.35 : x
  2. Step 2: Convert to fraction form
    20,109.16/27,749.69 = 11,157.35/x
  3. Step 3: Cross multiply
    20,109.16x = 27,749.69 × 11,157.35
  4. Step 4: Simplify right side
    20,109.16x = 309,612,851.03
  5. Step 5: Solve for x
    x = 309,612,851.03/20,109.16
  6. Step 6: Final answer
    x = 15,396.61

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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.