Home / 20,515.58-28,311.63-12,965.27

Finding the Fourth Proportional to 20,515.58, 28,311.63 and 12,965.27

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Solution

The fourth proportional to 20,515.58, 28,311.63 and 12,965.27 is: 17,892.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.58 : 28,311.63 = 12,965.27 : x
  2. Step 2: Convert to fraction form
    20,515.58/28,311.63 = 12,965.27/x
  3. Step 3: Cross multiply
    20,515.58x = 28,311.63 × 12,965.27
  4. Step 4: Simplify right side
    20,515.58x = 367,067,736.91
  5. Step 5: Solve for x
    x = 367,067,736.91/20,515.58
  6. Step 6: Final answer
    x = 17,892.15

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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.