Home / 20,781.49-28,680.84-11,706.94

Finding the Fourth Proportional to 20,781.49, 28,680.84 and 11,706.94

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Solution

The fourth proportional to 20,781.49, 28,680.84 and 11,706.94 is: 16,156.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.49 : 28,680.84 = 11,706.94 : x
  2. Step 2: Convert to fraction form
    20,781.49/28,680.84 = 11,706.94/x
  3. Step 3: Cross multiply
    20,781.49x = 28,680.84 × 11,706.94
  4. Step 4: Simplify right side
    20,781.49x = 335,764,873.03
  5. Step 5: Solve for x
    x = 335,764,873.03/20,781.49
  6. Step 6: Final answer
    x = 16,156.92

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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.