Home / 11,947.94-16,485.60-8,120.90

Finding the Fourth Proportional to 11,947.94, 16,485.60 and 8,120.90

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Solution

The fourth proportional to 11,947.94, 16,485.60 and 8,120.90 is: 11,205.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,947.94 : 16,485.60 = 8,120.90 : x
  2. Step 2: Convert to fraction form
    11,947.94/16,485.60 = 8,120.90/x
  3. Step 3: Cross multiply
    11,947.94x = 16,485.60 × 8,120.90
  4. Step 4: Simplify right side
    11,947.94x = 133,877,909.04
  5. Step 5: Solve for x
    x = 133,877,909.04/11,947.94
  6. Step 6: Final answer
    x = 11,205.10

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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.