Home / 13,140.27-18,131.97-7,475.73

Finding the Fourth Proportional to 13,140.27, 18,131.97 and 7,475.73

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Solution

The fourth proportional to 13,140.27, 18,131.97 and 7,475.73 is: 10,315.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.27 : 18,131.97 = 7,475.73 : x
  2. Step 2: Convert to fraction form
    13,140.27/18,131.97 = 7,475.73/x
  3. Step 3: Cross multiply
    13,140.27x = 18,131.97 × 7,475.73
  4. Step 4: Simplify right side
    13,140.27x = 135,549,712.09
  5. Step 5: Solve for x
    x = 135,549,712.09/13,140.27
  6. Step 6: Final answer
    x = 10,315.60

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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.