Home / 11,391.78-15,719.10-6,355.38

Finding the Fourth Proportional to 11,391.78, 15,719.10 and 6,355.38

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Solution

The fourth proportional to 11,391.78, 15,719.10 and 6,355.38 is: 8,769.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.78 : 15,719.10 = 6,355.38 : x
  2. Step 2: Convert to fraction form
    11,391.78/15,719.10 = 6,355.38/x
  3. Step 3: Cross multiply
    11,391.78x = 15,719.10 × 6,355.38
  4. Step 4: Simplify right side
    11,391.78x = 99,900,853.76
  5. Step 5: Solve for x
    x = 99,900,853.76/11,391.78
  6. Step 6: Final answer
    x = 8,769.56

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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.