Home / 13,170.74-18,163.24-8,686.68

Finding the Fourth Proportional to 13,170.74, 18,163.24 and 8,686.68

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Solution

The fourth proportional to 13,170.74, 18,163.24 and 8,686.68 is: 11,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.74 : 18,163.24 = 8,686.68 : x
  2. Step 2: Convert to fraction form
    13,170.74/18,163.24 = 8,686.68/x
  3. Step 3: Cross multiply
    13,170.74x = 18,163.24 × 8,686.68
  4. Step 4: Simplify right side
    13,170.74x = 157,778,163.81
  5. Step 5: Solve for x
    x = 157,778,163.81/13,170.74
  6. Step 6: Final answer
    x = 11,979.45

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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.