Home / 15,205.28-20,966.84-13,198.64

Finding the Fourth Proportional to 15,205.28, 20,966.84 and 13,198.64

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Solution

The fourth proportional to 15,205.28, 20,966.84 and 13,198.64 is: 18,199.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,205.28 : 20,966.84 = 13,198.64 : x
  2. Step 2: Convert to fraction form
    15,205.28/20,966.84 = 13,198.64/x
  3. Step 3: Cross multiply
    15,205.28x = 20,966.84 × 13,198.64
  4. Step 4: Simplify right side
    15,205.28x = 276,733,773.10
  5. Step 5: Solve for x
    x = 276,733,773.10/15,205.28
  6. Step 6: Final answer
    x = 18,199.85

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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.