Home / 11,427.58-15,769.99-6,391.78

Finding the Fourth Proportional to 11,427.58, 15,769.99 and 6,391.78

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Solution

The fourth proportional to 11,427.58, 15,769.99 and 6,391.78 is: 8,820.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,427.58 : 15,769.99 = 6,391.78 : x
  2. Step 2: Convert to fraction form
    11,427.58/15,769.99 = 6,391.78/x
  3. Step 3: Cross multiply
    11,427.58x = 15,769.99 × 6,391.78
  4. Step 4: Simplify right side
    11,427.58x = 100,798,306.68
  5. Step 5: Solve for x
    x = 100,798,306.68/11,427.58
  6. Step 6: Final answer
    x = 8,820.62

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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.