Home / 20,667.16-28,520.94-11,235.88

Finding the Fourth Proportional to 20,667.16, 28,520.94 and 11,235.88

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Solution

The fourth proportional to 20,667.16, 28,520.94 and 11,235.88 is: 15,505.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.16 : 28,520.94 = 11,235.88 : x
  2. Step 2: Convert to fraction form
    20,667.16/28,520.94 = 11,235.88/x
  3. Step 3: Cross multiply
    20,667.16x = 28,520.94 × 11,235.88
  4. Step 4: Simplify right side
    20,667.16x = 320,457,859.33
  5. Step 5: Solve for x
    x = 320,457,859.33/20,667.16
  6. Step 6: Final answer
    x = 15,505.66

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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.