Home / 13,491.09-18,518.65-11,965.66

Finding the Fourth Proportional to 13,491.09, 18,518.65 and 11,965.66

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Solution

The fourth proportional to 13,491.09, 18,518.65 and 11,965.66 is: 16,424.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.09 : 18,518.65 = 11,965.66 : x
  2. Step 2: Convert to fraction form
    13,491.09/18,518.65 = 11,965.66/x
  3. Step 3: Cross multiply
    13,491.09x = 18,518.65 × 11,965.66
  4. Step 4: Simplify right side
    13,491.09x = 221,587,793.35
  5. Step 5: Solve for x
    x = 221,587,793.35/13,491.09
  6. Step 6: Final answer
    x = 16,424.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.