Home / 13,729.49-18,939.36-8,353.58

Finding the Fourth Proportional to 13,729.49, 18,939.36 and 8,353.58

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Solution

The fourth proportional to 13,729.49, 18,939.36 and 8,353.58 is: 11,523.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.49 : 18,939.36 = 8,353.58 : x
  2. Step 2: Convert to fraction form
    13,729.49/18,939.36 = 8,353.58/x
  3. Step 3: Cross multiply
    13,729.49x = 18,939.36 × 8,353.58
  4. Step 4: Simplify right side
    13,729.49x = 158,211,364.21
  5. Step 5: Solve for x
    x = 158,211,364.21/13,729.49
  6. Step 6: Final answer
    x = 11,523.47

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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.