Home / 20,553.35-30,772.77-13,139.51

Finding the Fourth Proportional to 20,553.35, 30,772.77 and 13,139.51

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Solution

The fourth proportional to 20,553.35, 30,772.77 and 13,139.51 is: 19,672.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.35 : 30,772.77 = 13,139.51 : x
  2. Step 2: Convert to fraction form
    20,553.35/30,772.77 = 13,139.51/x
  3. Step 3: Cross multiply
    20,553.35x = 30,772.77 × 13,139.51
  4. Step 4: Simplify right side
    20,553.35x = 404,339,119.14
  5. Step 5: Solve for x
    x = 404,339,119.14/20,553.35
  6. Step 6: Final answer
    x = 19,672.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.