Home / 13,324.63-18,388.58-7,661.21

Finding the Fourth Proportional to 13,324.63, 18,388.58 and 7,661.21

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Solution

The fourth proportional to 13,324.63, 18,388.58 and 7,661.21 is: 10,572.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,324.63 : 18,388.58 = 7,661.21 : x
  2. Step 2: Convert to fraction form
    13,324.63/18,388.58 = 7,661.21/x
  3. Step 3: Cross multiply
    13,324.63x = 18,388.58 × 7,661.21
  4. Step 4: Simplify right side
    13,324.63x = 140,878,734.68
  5. Step 5: Solve for x
    x = 140,878,734.68/13,324.63
  6. Step 6: Final answer
    x = 10,572.81

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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.