Home / 13,679.37-18,869.22-8,639.55

Finding the Fourth Proportional to 13,679.37, 18,869.22 and 8,639.55

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Solution

The fourth proportional to 13,679.37, 18,869.22 and 8,639.55 is: 11,917.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.37 : 18,869.22 = 8,639.55 : x
  2. Step 2: Convert to fraction form
    13,679.37/18,869.22 = 8,639.55/x
  3. Step 3: Cross multiply
    13,679.37x = 18,869.22 × 8,639.55
  4. Step 4: Simplify right side
    13,679.37x = 163,021,569.65
  5. Step 5: Solve for x
    x = 163,021,569.65/13,679.37
  6. Step 6: Final answer
    x = 11,917.33

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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.