Home / 13,145.07-18,140.24-8,429.37

Finding the Fourth Proportional to 13,145.07, 18,140.24 and 8,429.37

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Solution

The fourth proportional to 13,145.07, 18,140.24 and 8,429.37 is: 11,632.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.07 : 18,140.24 = 8,429.37 : x
  2. Step 2: Convert to fraction form
    13,145.07/18,140.24 = 8,429.37/x
  3. Step 3: Cross multiply
    13,145.07x = 18,140.24 × 8,429.37
  4. Step 4: Simplify right side
    13,145.07x = 152,910,850.74
  5. Step 5: Solve for x
    x = 152,910,850.74/13,145.07
  6. Step 6: Final answer
    x = 11,632.56

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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.