Home / 13,320.65-19,980.97-3,960.63

Finding the Fourth Proportional to 13,320.65, 19,980.97 and 3,960.63

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Solution

The fourth proportional to 13,320.65, 19,980.97 and 3,960.63 is: 5,940.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.65 : 19,980.97 = 3,960.63 : x
  2. Step 2: Convert to fraction form
    13,320.65/19,980.97 = 3,960.63/x
  3. Step 3: Cross multiply
    13,320.65x = 19,980.97 × 3,960.63
  4. Step 4: Simplify right side
    13,320.65x = 79,137,229.21
  5. Step 5: Solve for x
    x = 79,137,229.21/13,320.65
  6. Step 6: Final answer
    x = 5,940.94

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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.