Home / 20,440.08-28,206.40-11,942.99

Finding the Fourth Proportional to 20,440.08, 28,206.40 and 11,942.99

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Solution

The fourth proportional to 20,440.08, 28,206.40 and 11,942.99 is: 16,480.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.08 : 28,206.40 = 11,942.99 : x
  2. Step 2: Convert to fraction form
    20,440.08/28,206.40 = 11,942.99/x
  3. Step 3: Cross multiply
    20,440.08x = 28,206.40 × 11,942.99
  4. Step 4: Simplify right side
    20,440.08x = 336,868,753.14
  5. Step 5: Solve for x
    x = 336,868,753.14/20,440.08
  6. Step 6: Final answer
    x = 16,480.79

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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.