Home / 20,872.48-28,801.68-12,919.84

Finding the Fourth Proportional to 20,872.48, 28,801.68 and 12,919.84

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Solution

The fourth proportional to 20,872.48, 28,801.68 and 12,919.84 is: 17,827.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.48 : 28,801.68 = 12,919.84 : x
  2. Step 2: Convert to fraction form
    20,872.48/28,801.68 = 12,919.84/x
  3. Step 3: Cross multiply
    20,872.48x = 28,801.68 × 12,919.84
  4. Step 4: Simplify right side
    20,872.48x = 372,113,097.33
  5. Step 5: Solve for x
    x = 372,113,097.33/20,872.48
  6. Step 6: Final answer
    x = 17,827.93

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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.