Home / 20,745.72-31,118.62-13,770.36

Finding the Fourth Proportional to 20,745.72, 31,118.62 and 13,770.36

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Solution

The fourth proportional to 20,745.72, 31,118.62 and 13,770.36 is: 20,655.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.72 : 31,118.62 = 13,770.36 : x
  2. Step 2: Convert to fraction form
    20,745.72/31,118.62 = 13,770.36/x
  3. Step 3: Cross multiply
    20,745.72x = 31,118.62 × 13,770.36
  4. Step 4: Simplify right side
    20,745.72x = 428,514,600.10
  5. Step 5: Solve for x
    x = 428,514,600.10/20,745.72
  6. Step 6: Final answer
    x = 20,655.57

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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.