Home / 20,383.55-28,126.59-11,308.79

Finding the Fourth Proportional to 20,383.55, 28,126.59 and 11,308.79

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Solution

The fourth proportional to 20,383.55, 28,126.59 and 11,308.79 is: 15,604.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.55 : 28,126.59 = 11,308.79 : x
  2. Step 2: Convert to fraction form
    20,383.55/28,126.59 = 11,308.79/x
  3. Step 3: Cross multiply
    20,383.55x = 28,126.59 × 11,308.79
  4. Step 4: Simplify right side
    20,383.55x = 318,077,699.73
  5. Step 5: Solve for x
    x = 318,077,699.73/20,383.55
  6. Step 6: Final answer
    x = 15,604.63

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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.