Home / 20,825.80-31,238.70-12,083.20

Finding the Fourth Proportional to 20,825.80, 31,238.70 and 12,083.20

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Solution

The fourth proportional to 20,825.80, 31,238.70 and 12,083.20 is: 18,124.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.80 : 31,238.70 = 12,083.20 : x
  2. Step 2: Convert to fraction form
    20,825.80/31,238.70 = 12,083.20/x
  3. Step 3: Cross multiply
    20,825.80x = 31,238.70 × 12,083.20
  4. Step 4: Simplify right side
    20,825.80x = 377,463,459.84
  5. Step 5: Solve for x
    x = 377,463,459.84/20,825.80
  6. Step 6: Final answer
    x = 18,124.80

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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.