Home / 20,808.99-28,715.85-11,857.86

Finding the Fourth Proportional to 20,808.99, 28,715.85 and 11,857.86

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Solution

The fourth proportional to 20,808.99, 28,715.85 and 11,857.86 is: 16,363.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.99 : 28,715.85 = 11,857.86 : x
  2. Step 2: Convert to fraction form
    20,808.99/28,715.85 = 11,857.86/x
  3. Step 3: Cross multiply
    20,808.99x = 28,715.85 × 11,857.86
  4. Step 4: Simplify right side
    20,808.99x = 340,508,529.08
  5. Step 5: Solve for x
    x = 340,508,529.08/20,808.99
  6. Step 6: Final answer
    x = 16,363.53

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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.