Home / 20,128.34-27,778.42-11,630.84

Finding the Fourth Proportional to 20,128.34, 27,778.42 and 11,630.84

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Solution

The fourth proportional to 20,128.34, 27,778.42 and 11,630.84 is: 16,051.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.34 : 27,778.42 = 11,630.84 : x
  2. Step 2: Convert to fraction form
    20,128.34/27,778.42 = 11,630.84/x
  3. Step 3: Cross multiply
    20,128.34x = 27,778.42 × 11,630.84
  4. Step 4: Simplify right side
    20,128.34x = 323,086,358.47
  5. Step 5: Solve for x
    x = 323,086,358.47/20,128.34
  6. Step 6: Final answer
    x = 16,051.32

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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.