Home / 13,789.94-19,031.04-7,821.99

Finding the Fourth Proportional to 13,789.94, 19,031.04 and 7,821.99

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Solution

The fourth proportional to 13,789.94, 19,031.04 and 7,821.99 is: 10,794.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.94 : 19,031.04 = 7,821.99 : x
  2. Step 2: Convert to fraction form
    13,789.94/19,031.04 = 7,821.99/x
  3. Step 3: Cross multiply
    13,789.94x = 19,031.04 × 7,821.99
  4. Step 4: Simplify right side
    13,789.94x = 148,860,604.57
  5. Step 5: Solve for x
    x = 148,860,604.57/13,789.94
  6. Step 6: Final answer
    x = 10,794.87

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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.