Home / 20,128.76-27,780.97-11,743.64

Finding the Fourth Proportional to 20,128.76, 27,780.97 and 11,743.64

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Solution

The fourth proportional to 20,128.76, 27,780.97 and 11,743.64 is: 16,208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.76 : 27,780.97 = 11,743.64 : x
  2. Step 2: Convert to fraction form
    20,128.76/27,780.97 = 11,743.64/x
  3. Step 3: Cross multiply
    20,128.76x = 27,780.97 × 11,743.64
  4. Step 4: Simplify right side
    20,128.76x = 326,249,710.53
  5. Step 5: Solve for x
    x = 326,249,710.53/20,128.76
  6. Step 6: Final answer
    x = 16,208.14

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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.