Home / 20,878.97-28,796.72-12,925.58

Finding the Fourth Proportional to 20,878.97, 28,796.72 and 12,925.58

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Solution

The fourth proportional to 20,878.97, 28,796.72 and 12,925.58 is: 17,827.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.97 : 28,796.72 = 12,925.58 : x
  2. Step 2: Convert to fraction form
    20,878.97/28,796.72 = 12,925.58/x
  3. Step 3: Cross multiply
    20,878.97x = 28,796.72 × 12,925.58
  4. Step 4: Simplify right side
    20,878.97x = 372,214,099.49
  5. Step 5: Solve for x
    x = 372,214,099.49/20,878.97
  6. Step 6: Final answer
    x = 17,827.23

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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.