Home / 20,667.05-28,520.74-11,235.61

Finding the Fourth Proportional to 20,667.05, 28,520.74 and 11,235.61

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Solution

The fourth proportional to 20,667.05, 28,520.74 and 11,235.61 is: 15,505.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.05 : 28,520.74 = 11,235.61 : x
  2. Step 2: Convert to fraction form
    20,667.05/28,520.74 = 11,235.61/x
  3. Step 3: Cross multiply
    20,667.05x = 28,520.74 × 11,235.61
  4. Step 4: Simplify right side
    20,667.05x = 320,447,961.25
  5. Step 5: Solve for x
    x = 320,447,961.25/20,667.05
  6. Step 6: Final answer
    x = 15,505.26

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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.