Home / 20,792.46-28,685.42-12,820.84

Finding the Fourth Proportional to 20,792.46, 28,685.42 and 12,820.84

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Solution

The fourth proportional to 20,792.46, 28,685.42 and 12,820.84 is: 17,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.46 : 28,685.42 = 12,820.84 : x
  2. Step 2: Convert to fraction form
    20,792.46/28,685.42 = 12,820.84/x
  3. Step 3: Cross multiply
    20,792.46x = 28,685.42 × 12,820.84
  4. Step 4: Simplify right side
    20,792.46x = 367,771,180.15
  5. Step 5: Solve for x
    x = 367,771,180.15/20,792.46
  6. Step 6: Final answer
    x = 17,687.72

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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.