Home / 12,591.28-18,884.36-11,966.80

Finding the Fourth Proportional to 12,591.28, 18,884.36 and 11,966.80

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Solution

The fourth proportional to 12,591.28, 18,884.36 and 11,966.80 is: 17,947.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.28 : 18,884.36 = 11,966.80 : x
  2. Step 2: Convert to fraction form
    12,591.28/18,884.36 = 11,966.80/x
  3. Step 3: Cross multiply
    12,591.28x = 18,884.36 × 11,966.80
  4. Step 4: Simplify right side
    12,591.28x = 225,985,359.25
  5. Step 5: Solve for x
    x = 225,985,359.25/12,591.28
  6. Step 6: Final answer
    x = 17,947.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.