Home / 20,109.77-27,751.65-11,157.86

Finding the Fourth Proportional to 20,109.77, 27,751.65 and 11,157.86

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Solution

The fourth proportional to 20,109.77, 27,751.65 and 11,157.86 is: 15,397.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.77 : 27,751.65 = 11,157.86 : x
  2. Step 2: Convert to fraction form
    20,109.77/27,751.65 = 11,157.86/x
  3. Step 3: Cross multiply
    20,109.77x = 27,751.65 × 11,157.86
  4. Step 4: Simplify right side
    20,109.77x = 309,649,025.47
  5. Step 5: Solve for x
    x = 309,649,025.47/20,109.77
  6. Step 6: Final answer
    x = 15,397.94

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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.