Home / 13,553.09-18,721.13-10,405.27

Finding the Fourth Proportional to 13,553.09, 18,721.13 and 10,405.27

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Solution

The fourth proportional to 13,553.09, 18,721.13 and 10,405.27 is: 14,372.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,553.09 : 18,721.13 = 10,405.27 : x
  2. Step 2: Convert to fraction form
    13,553.09/18,721.13 = 10,405.27/x
  3. Step 3: Cross multiply
    13,553.09x = 18,721.13 × 10,405.27
  4. Step 4: Simplify right side
    13,553.09x = 194,798,360.33
  5. Step 5: Solve for x
    x = 194,798,360.33/13,553.09
  6. Step 6: Final answer
    x = 14,372.99

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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.