Home / 13,721.71-18,936.91-8,346.25

Finding the Fourth Proportional to 13,721.71, 18,936.91 and 8,346.25

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Solution

The fourth proportional to 13,721.71, 18,936.91 and 8,346.25 is: 11,518.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.71 : 18,936.91 = 8,346.25 : x
  2. Step 2: Convert to fraction form
    13,721.71/18,936.91 = 8,346.25/x
  3. Step 3: Cross multiply
    13,721.71x = 18,936.91 × 8,346.25
  4. Step 4: Simplify right side
    13,721.71x = 158,052,185.09
  5. Step 5: Solve for x
    x = 158,052,185.09/13,721.71
  6. Step 6: Final answer
    x = 11,518.40

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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.