Home / 20,335.42-28,063.11-11,383.78

Finding the Fourth Proportional to 20,335.42, 28,063.11 and 11,383.78

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Solution

The fourth proportional to 20,335.42, 28,063.11 and 11,383.78 is: 15,709.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.42 : 28,063.11 = 11,383.78 : x
  2. Step 2: Convert to fraction form
    20,335.42/28,063.11 = 11,383.78/x
  3. Step 3: Cross multiply
    20,335.42x = 28,063.11 × 11,383.78
  4. Step 4: Simplify right side
    20,335.42x = 319,464,270.36
  5. Step 5: Solve for x
    x = 319,464,270.36/20,335.42
  6. Step 6: Final answer
    x = 15,709.75

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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.