Home / 20,667.58-28,521.30-11,236.12

Finding the Fourth Proportional to 20,667.58, 28,521.30 and 11,236.12

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Solution

The fourth proportional to 20,667.58, 28,521.30 and 11,236.12 is: 15,505.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.58 : 28,521.30 = 11,236.12 : x
  2. Step 2: Convert to fraction form
    20,667.58/28,521.30 = 11,236.12/x
  3. Step 3: Cross multiply
    20,667.58x = 28,521.30 × 11,236.12
  4. Step 4: Simplify right side
    20,667.58x = 320,468,749.36
  5. Step 5: Solve for x
    x = 320,468,749.36/20,667.58
  6. Step 6: Final answer
    x = 15,505.87

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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.