Home / 12,481.28-18,721.86-3,716.20

Finding the Fourth Proportional to 12,481.28, 18,721.86 and 3,716.20

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Solution

The fourth proportional to 12,481.28, 18,721.86 and 3,716.20 is: 5,574.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,481.28 : 18,721.86 = 3,716.20 : x
  2. Step 2: Convert to fraction form
    12,481.28/18,721.86 = 3,716.20/x
  3. Step 3: Cross multiply
    12,481.28x = 18,721.86 × 3,716.20
  4. Step 4: Simplify right side
    12,481.28x = 69,574,176.13
  5. Step 5: Solve for x
    x = 69,574,176.13/12,481.28
  6. Step 6: Final answer
    x = 5,574.28

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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.