Home / 20,135.78-27,782.90-12,177.84

Finding the Fourth Proportional to 20,135.78, 27,782.90 and 12,177.84

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Solution

The fourth proportional to 20,135.78, 27,782.90 and 12,177.84 is: 16,802.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.78 : 27,782.90 = 12,177.84 : x
  2. Step 2: Convert to fraction form
    20,135.78/27,782.90 = 12,177.84/x
  3. Step 3: Cross multiply
    20,135.78x = 27,782.90 × 12,177.84
  4. Step 4: Simplify right side
    20,135.78x = 338,335,710.94
  5. Step 5: Solve for x
    x = 338,335,710.94/20,135.78
  6. Step 6: Final answer
    x = 16,802.71

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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.