Home / 13,620.54-18,806.85-10,979.74

Finding the Fourth Proportional to 13,620.54, 18,806.85 and 10,979.74

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Solution

The fourth proportional to 13,620.54, 18,806.85 and 10,979.74 is: 15,160.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.54 : 18,806.85 = 10,979.74 : x
  2. Step 2: Convert to fraction form
    13,620.54/18,806.85 = 10,979.74/x
  3. Step 3: Cross multiply
    13,620.54x = 18,806.85 × 10,979.74
  4. Step 4: Simplify right side
    13,620.54x = 206,494,323.22
  5. Step 5: Solve for x
    x = 206,494,323.22/13,620.54
  6. Step 6: Final answer
    x = 15,160.51

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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.