Home / 13,290.92-19,940.61-3,930.99

Finding the Fourth Proportional to 13,290.92, 19,940.61 and 3,930.99

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Solution

The fourth proportional to 13,290.92, 19,940.61 and 3,930.99 is: 5,897.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.92 : 19,940.61 = 3,930.99 : x
  2. Step 2: Convert to fraction form
    13,290.92/19,940.61 = 3,930.99/x
  3. Step 3: Cross multiply
    13,290.92x = 19,940.61 × 3,930.99
  4. Step 4: Simplify right side
    13,290.92x = 78,386,338.50
  5. Step 5: Solve for x
    x = 78,386,338.50/13,290.92
  6. Step 6: Final answer
    x = 5,897.74

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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.