Home / 13,721.37-18,936.90-9,896.19

Finding the Fourth Proportional to 13,721.37, 18,936.90 and 9,896.19

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Solution

The fourth proportional to 13,721.37, 18,936.90 and 9,896.19 is: 13,657.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.37 : 18,936.90 = 9,896.19 : x
  2. Step 2: Convert to fraction form
    13,721.37/18,936.90 = 9,896.19/x
  3. Step 3: Cross multiply
    13,721.37x = 18,936.90 × 9,896.19
  4. Step 4: Simplify right side
    13,721.37x = 187,403,160.41
  5. Step 5: Solve for x
    x = 187,403,160.41/13,721.37
  6. Step 6: Final answer
    x = 13,657.76

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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.