Home / 13,813.12-20,669.88-11,888.56

Finding the Fourth Proportional to 13,813.12, 20,669.88 and 11,888.56

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Solution

The fourth proportional to 13,813.12, 20,669.88 and 11,888.56 is: 17,789.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,813.12 : 20,669.88 = 11,888.56 : x
  2. Step 2: Convert to fraction form
    13,813.12/20,669.88 = 11,888.56/x
  3. Step 3: Cross multiply
    13,813.12x = 20,669.88 × 11,888.56
  4. Step 4: Simplify right side
    13,813.12x = 245,735,108.57
  5. Step 5: Solve for x
    x = 245,735,108.57/13,813.12
  6. Step 6: Final answer
    x = 17,789.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.