Home / 19,205.40-28,808.10-11,785.80

Finding the Fourth Proportional to 19,205.40, 28,808.10 and 11,785.80

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Solution

The fourth proportional to 19,205.40, 28,808.10 and 11,785.80 is: 17,678.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,205.40 : 28,808.10 = 11,785.80 : x
  2. Step 2: Convert to fraction form
    19,205.40/28,808.10 = 11,785.80/x
  3. Step 3: Cross multiply
    19,205.40x = 28,808.10 × 11,785.80
  4. Step 4: Simplify right side
    19,205.40x = 339,526,504.98
  5. Step 5: Solve for x
    x = 339,526,504.98/19,205.40
  6. Step 6: Final answer
    x = 17,678.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.