Home / 20,792.19-28,685.09-12,820.58

Finding the Fourth Proportional to 20,792.19, 28,685.09 and 12,820.58

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Solution

The fourth proportional to 20,792.19, 28,685.09 and 12,820.58 is: 17,687.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.19 : 28,685.09 = 12,820.58 : x
  2. Step 2: Convert to fraction form
    20,792.19/28,685.09 = 12,820.58/x
  3. Step 3: Cross multiply
    20,792.19x = 28,685.09 × 12,820.58
  4. Step 4: Simplify right side
    20,792.19x = 367,759,283.62
  5. Step 5: Solve for x
    x = 367,759,283.62/20,792.19
  6. Step 6: Final answer
    x = 17,687.38

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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.