Home / 20,732.85-28,588.14-13,169.61

Finding the Fourth Proportional to 20,732.85, 28,588.14 and 13,169.61

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Solution

The fourth proportional to 20,732.85, 28,588.14 and 13,169.61 is: 18,159.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,732.85 : 28,588.14 = 13,169.61 : x
  2. Step 2: Convert to fraction form
    20,732.85/28,588.14 = 13,169.61/x
  3. Step 3: Cross multiply
    20,732.85x = 28,588.14 × 13,169.61
  4. Step 4: Simplify right side
    20,732.85x = 376,494,654.43
  5. Step 5: Solve for x
    x = 376,494,654.43/20,732.85
  6. Step 6: Final answer
    x = 18,159.33

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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.