Home / 13,189.40-18,209.86-11,770.66

Finding the Fourth Proportional to 13,189.40, 18,209.86 and 11,770.66

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Solution

The fourth proportional to 13,189.40, 18,209.86 and 11,770.66 is: 16,251.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.40 : 18,209.86 = 11,770.66 : x
  2. Step 2: Convert to fraction form
    13,189.40/18,209.86 = 11,770.66/x
  3. Step 3: Cross multiply
    13,189.40x = 18,209.86 × 11,770.66
  4. Step 4: Simplify right side
    13,189.40x = 214,342,070.71
  5. Step 5: Solve for x
    x = 214,342,070.71/13,189.40
  6. Step 6: Final answer
    x = 16,251.09

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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.