Home / 20,857.03-28,759.63-13,291.37

Finding the Fourth Proportional to 20,857.03, 28,759.63 and 13,291.37

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Solution

The fourth proportional to 20,857.03, 28,759.63 and 13,291.37 is: 18,327.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.03 : 28,759.63 = 13,291.37 : x
  2. Step 2: Convert to fraction form
    20,857.03/28,759.63 = 13,291.37/x
  3. Step 3: Cross multiply
    20,857.03x = 28,759.63 × 13,291.37
  4. Step 4: Simplify right side
    20,857.03x = 382,254,883.39
  5. Step 5: Solve for x
    x = 382,254,883.39/20,857.03
  6. Step 6: Final answer
    x = 18,327.39

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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.