Home / 19,206.40-28,772.64-11,789.20

Finding the Fourth Proportional to 19,206.40, 28,772.64 and 11,789.20

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Solution

The fourth proportional to 19,206.40, 28,772.64 and 11,789.20 is: 17,661.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,206.40 : 28,772.64 = 11,789.20 : x
  2. Step 2: Convert to fraction form
    19,206.40/28,772.64 = 11,789.20/x
  3. Step 3: Cross multiply
    19,206.40x = 28,772.64 × 11,789.20
  4. Step 4: Simplify right side
    19,206.40x = 339,206,407.49
  5. Step 5: Solve for x
    x = 339,206,407.49/19,206.40
  6. Step 6: Final answer
    x = 17,661.11

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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.