Home / 20,556.07-28,348.12-13,645.01

Finding the Fourth Proportional to 20,556.07, 28,348.12 and 13,645.01

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Solution

The fourth proportional to 20,556.07, 28,348.12 and 13,645.01 is: 18,817.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.07 : 28,348.12 = 13,645.01 : x
  2. Step 2: Convert to fraction form
    20,556.07/28,348.12 = 13,645.01/x
  3. Step 3: Cross multiply
    20,556.07x = 28,348.12 × 13,645.01
  4. Step 4: Simplify right side
    20,556.07x = 386,810,170.92
  5. Step 5: Solve for x
    x = 386,810,170.92/20,556.07
  6. Step 6: Final answer
    x = 18,817.33

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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.