Home / 20,123.40-27,770.99-11,171.06

Finding the Fourth Proportional to 20,123.40, 27,770.99 and 11,171.06

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Solution

The fourth proportional to 20,123.40, 27,770.99 and 11,171.06 is: 15,416.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.40 : 27,770.99 = 11,171.06 : x
  2. Step 2: Convert to fraction form
    20,123.40/27,770.99 = 11,171.06/x
  3. Step 3: Cross multiply
    20,123.40x = 27,770.99 × 11,171.06
  4. Step 4: Simplify right side
    20,123.40x = 310,231,200.84
  5. Step 5: Solve for x
    x = 310,231,200.84/20,123.40
  6. Step 6: Final answer
    x = 15,416.44

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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.