Home / 13,378.40-18,420.97-11,883.71

Finding the Fourth Proportional to 13,378.40, 18,420.97 and 11,883.71

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Solution

The fourth proportional to 13,378.40, 18,420.97 and 11,883.71 is: 16,362.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.40 : 18,420.97 = 11,883.71 : x
  2. Step 2: Convert to fraction form
    13,378.40/18,420.97 = 11,883.71/x
  3. Step 3: Cross multiply
    13,378.40x = 18,420.97 × 11,883.71
  4. Step 4: Simplify right side
    13,378.40x = 218,909,481.74
  5. Step 5: Solve for x
    x = 218,909,481.74/13,378.40
  6. Step 6: Final answer
    x = 16,362.91

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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.