Home / 13,330.20-19,995.30-7,789.80

Finding the Fourth Proportional to 13,330.20, 19,995.30 and 7,789.80

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Solution

The fourth proportional to 13,330.20, 19,995.30 and 7,789.80 is: 11,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,330.20 : 19,995.30 = 7,789.80 : x
  2. Step 2: Convert to fraction form
    13,330.20/19,995.30 = 7,789.80/x
  3. Step 3: Cross multiply
    13,330.20x = 19,995.30 × 7,789.80
  4. Step 4: Simplify right side
    13,330.20x = 155,759,387.94
  5. Step 5: Solve for x
    x = 155,759,387.94/13,330.20
  6. Step 6: Final answer
    x = 11,684.70

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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.