Home / 20,808.14-28,715.45-11,855.61

Finding the Fourth Proportional to 20,808.14, 28,715.45 and 11,855.61

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Solution

The fourth proportional to 20,808.14, 28,715.45 and 11,855.61 is: 16,360.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.14 : 28,715.45 = 11,855.61 : x
  2. Step 2: Convert to fraction form
    20,808.14/28,715.45 = 11,855.61/x
  3. Step 3: Cross multiply
    20,808.14x = 28,715.45 × 11,855.61
  4. Step 4: Simplify right side
    20,808.14x = 340,439,116.90
  5. Step 5: Solve for x
    x = 340,439,116.90/20,808.14
  6. Step 6: Final answer
    x = 16,360.87

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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.