Home / 20,515.61-28,311.09-12,016.68

Finding the Fourth Proportional to 20,515.61, 28,311.09 and 12,016.68

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Solution

The fourth proportional to 20,515.61, 28,311.09 and 12,016.68 is: 16,582.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.61 : 28,311.09 = 12,016.68 : x
  2. Step 2: Convert to fraction form
    20,515.61/28,311.09 = 12,016.68/x
  3. Step 3: Cross multiply
    20,515.61x = 28,311.09 × 12,016.68
  4. Step 4: Simplify right side
    20,515.61x = 340,205,308.98
  5. Step 5: Solve for x
    x = 340,205,308.98/20,515.61
  6. Step 6: Final answer
    x = 16,582.76

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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.