Home / 20,542.10-30,755.91-13,128.26

Finding the Fourth Proportional to 20,542.10, 30,755.91 and 13,128.26

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Solution

The fourth proportional to 20,542.10, 30,755.91 and 13,128.26 is: 19,655.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.10 : 30,755.91 = 13,128.26 : x
  2. Step 2: Convert to fraction form
    20,542.10/30,755.91 = 13,128.26/x
  3. Step 3: Cross multiply
    20,542.10x = 30,755.91 × 13,128.26
  4. Step 4: Simplify right side
    20,542.10x = 403,771,583.02
  5. Step 5: Solve for x
    x = 403,771,583.02/20,542.10
  6. Step 6: Final answer
    x = 19,655.81

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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.