Home / 20,731.09-28,613.52-13,175.95

Finding the Fourth Proportional to 20,731.09, 28,613.52 and 13,175.95

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Solution

The fourth proportional to 20,731.09, 28,613.52 and 13,175.95 is: 18,185.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.09 : 28,613.52 = 13,175.95 : x
  2. Step 2: Convert to fraction form
    20,731.09/28,613.52 = 13,175.95/x
  3. Step 3: Cross multiply
    20,731.09x = 28,613.52 × 13,175.95
  4. Step 4: Simplify right side
    20,731.09x = 377,010,308.84
  5. Step 5: Solve for x
    x = 377,010,308.84/20,731.09
  6. Step 6: Final answer
    x = 18,185.74

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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.