Home / 20,766.97-28,668.70-12,813.58

Finding the Fourth Proportional to 20,766.97, 28,668.70 and 12,813.58

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Solution

The fourth proportional to 20,766.97, 28,668.70 and 12,813.58 is: 17,689.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.97 : 28,668.70 = 12,813.58 : x
  2. Step 2: Convert to fraction form
    20,766.97/28,668.70 = 12,813.58/x
  3. Step 3: Cross multiply
    20,766.97x = 28,668.70 × 12,813.58
  4. Step 4: Simplify right side
    20,766.97x = 367,348,680.95
  5. Step 5: Solve for x
    x = 367,348,680.95/20,766.97
  6. Step 6: Final answer
    x = 17,689.08

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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.