Home / 13,639.11-18,815.61-8,858.71

Finding the Fourth Proportional to 13,639.11, 18,815.61 and 8,858.71

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Solution

The fourth proportional to 13,639.11, 18,815.61 and 8,858.71 is: 12,220.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.11 : 18,815.61 = 8,858.71 : x
  2. Step 2: Convert to fraction form
    13,639.11/18,815.61 = 8,858.71/x
  3. Step 3: Cross multiply
    13,639.11x = 18,815.61 × 8,858.71
  4. Step 4: Simplify right side
    13,639.11x = 166,682,032.46
  5. Step 5: Solve for x
    x = 166,682,032.46/13,639.11
  6. Step 6: Final answer
    x = 12,220.89

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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.