Home / 20,745.59-31,115.48-12,849.57

Finding the Fourth Proportional to 20,745.59, 31,115.48 and 12,849.57

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Solution

The fourth proportional to 20,745.59, 31,115.48 and 12,849.57 is: 19,272.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.59 : 31,115.48 = 12,849.57 : x
  2. Step 2: Convert to fraction form
    20,745.59/31,115.48 = 12,849.57/x
  3. Step 3: Cross multiply
    20,745.59x = 31,115.48 × 12,849.57
  4. Step 4: Simplify right side
    20,745.59x = 399,820,474.10
  5. Step 5: Solve for x
    x = 399,820,474.10/20,745.59
  6. Step 6: Final answer
    x = 19,272.56

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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.