Home / 20,434.34-28,198.59-12,489.86

Finding the Fourth Proportional to 20,434.34, 28,198.59 and 12,489.86

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Solution

The fourth proportional to 20,434.34, 28,198.59 and 12,489.86 is: 17,235.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.34 : 28,198.59 = 12,489.86 : x
  2. Step 2: Convert to fraction form
    20,434.34/28,198.59 = 12,489.86/x
  3. Step 3: Cross multiply
    20,434.34x = 28,198.59 × 12,489.86
  4. Step 4: Simplify right side
    20,434.34x = 352,196,441.30
  5. Step 5: Solve for x
    x = 352,196,441.30/20,434.34
  6. Step 6: Final answer
    x = 17,235.52

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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.