Home / 20,680.54-28,536.82-12,182.11

Finding the Fourth Proportional to 20,680.54, 28,536.82 and 12,182.11

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Solution

The fourth proportional to 20,680.54, 28,536.82 and 12,182.11 is: 16,809.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.54 : 28,536.82 = 12,182.11 : x
  2. Step 2: Convert to fraction form
    20,680.54/28,536.82 = 12,182.11/x
  3. Step 3: Cross multiply
    20,680.54x = 28,536.82 × 12,182.11
  4. Step 4: Simplify right side
    20,680.54x = 347,638,568.06
  5. Step 5: Solve for x
    x = 347,638,568.06/20,680.54
  6. Step 6: Final answer
    x = 16,809.94

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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.