Home / 11,783.92-16,261.50-6,478.78

Finding the Fourth Proportional to 11,783.92, 16,261.50 and 6,478.78

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Solution

The fourth proportional to 11,783.92, 16,261.50 and 6,478.78 is: 8,940.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,783.92 : 16,261.50 = 6,478.78 : x
  2. Step 2: Convert to fraction form
    11,783.92/16,261.50 = 6,478.78/x
  3. Step 3: Cross multiply
    11,783.92x = 16,261.50 × 6,478.78
  4. Step 4: Simplify right side
    11,783.92x = 105,354,680.97
  5. Step 5: Solve for x
    x = 105,354,680.97/11,783.92
  6. Step 6: Final answer
    x = 8,940.55

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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.