Home / 11,783.20-16,232.40-8,240.80

Finding the Fourth Proportional to 11,783.20, 16,232.40 and 8,240.80

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Solution

The fourth proportional to 11,783.20, 16,232.40 and 8,240.80 is: 11,352.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,783.20 : 16,232.40 = 8,240.80 : x
  2. Step 2: Convert to fraction form
    11,783.20/16,232.40 = 8,240.80/x
  3. Step 3: Cross multiply
    11,783.20x = 16,232.40 × 8,240.80
  4. Step 4: Simplify right side
    11,783.20x = 133,767,961.92
  5. Step 5: Solve for x
    x = 133,767,961.92/11,783.20
  6. Step 6: Final answer
    x = 11,352.43

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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.