Home / 20,106.87-27,750.80-11,157.25

Finding the Fourth Proportional to 20,106.87, 27,750.80 and 11,157.25

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Solution

The fourth proportional to 20,106.87, 27,750.80 and 11,157.25 is: 15,398.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.87 : 27,750.80 = 11,157.25 : x
  2. Step 2: Convert to fraction form
    20,106.87/27,750.80 = 11,157.25/x
  3. Step 3: Cross multiply
    20,106.87x = 27,750.80 × 11,157.25
  4. Step 4: Simplify right side
    20,106.87x = 309,622,613.30
  5. Step 5: Solve for x
    x = 309,622,613.30/20,106.87
  6. Step 6: Final answer
    x = 15,398.85

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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.