Home / 13,412.71-18,518.52-11,991.79

Finding the Fourth Proportional to 13,412.71, 18,518.52 and 11,991.79

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Solution

The fourth proportional to 13,412.71, 18,518.52 and 11,991.79 is: 16,556.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.71 : 18,518.52 = 11,991.79 : x
  2. Step 2: Convert to fraction form
    13,412.71/18,518.52 = 11,991.79/x
  3. Step 3: Cross multiply
    13,412.71x = 18,518.52 × 11,991.79
  4. Step 4: Simplify right side
    13,412.71x = 222,070,202.95
  5. Step 5: Solve for x
    x = 222,070,202.95/13,412.71
  6. Step 6: Final answer
    x = 16,556.70

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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.