Home / 13,320.53-19,980.78-3,960.50

Finding the Fourth Proportional to 13,320.53, 19,980.78 and 3,960.50

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Solution

The fourth proportional to 13,320.53, 19,980.78 and 3,960.50 is: 5,940.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.53 : 19,980.78 = 3,960.50 : x
  2. Step 2: Convert to fraction form
    13,320.53/19,980.78 = 3,960.50/x
  3. Step 3: Cross multiply
    13,320.53x = 19,980.78 × 3,960.50
  4. Step 4: Simplify right side
    13,320.53x = 79,133,879.19
  5. Step 5: Solve for x
    x = 79,133,879.19/13,320.53
  6. Step 6: Final answer
    x = 5,940.75

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Similar ratio
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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.