Home / 20,755.90-28,634.48-13,587.57

Finding the Fourth Proportional to 20,755.90, 28,634.48 and 13,587.57

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Solution

The fourth proportional to 20,755.90, 28,634.48 and 13,587.57 is: 18,745.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.90 : 28,634.48 = 13,587.57 : x
  2. Step 2: Convert to fraction form
    20,755.90/28,634.48 = 13,587.57/x
  3. Step 3: Cross multiply
    20,755.90x = 28,634.48 × 13,587.57
  4. Step 4: Simplify right side
    20,755.90x = 389,072,933.48
  5. Step 5: Solve for x
    x = 389,072,933.48/20,755.90
  6. Step 6: Final answer
    x = 18,745.17

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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.