Home / 13,811.12-20,666.88-11,886.56

Finding the Fourth Proportional to 13,811.12, 20,666.88 and 11,886.56

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Solution

The fourth proportional to 13,811.12, 20,666.88 and 11,886.56 is: 17,786.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811.12 : 20,666.88 = 11,886.56 : x
  2. Step 2: Convert to fraction form
    13,811.12/20,666.88 = 11,886.56/x
  3. Step 3: Cross multiply
    13,811.12x = 20,666.88 × 11,886.56
  4. Step 4: Simplify right side
    13,811.12x = 245,658,109.13
  5. Step 5: Solve for x
    x = 245,658,109.13/13,811.12
  6. Step 6: Final answer
    x = 17,786.98

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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.