Home / 20,491.26-28,267.74-12,519.60

Finding the Fourth Proportional to 20,491.26, 28,267.74 and 12,519.60

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Solution

The fourth proportional to 20,491.26, 28,267.74 and 12,519.60 is: 17,270.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.26 : 28,267.74 = 12,519.60 : x
  2. Step 2: Convert to fraction form
    20,491.26/28,267.74 = 12,519.60/x
  3. Step 3: Cross multiply
    20,491.26x = 28,267.74 × 12,519.60
  4. Step 4: Simplify right side
    20,491.26x = 353,900,797.70
  5. Step 5: Solve for x
    x = 353,900,797.70/20,491.26
  6. Step 6: Final answer
    x = 17,270.82

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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.