Home / 20,725.50-31,119.39-12,442.58

Finding the Fourth Proportional to 20,725.50, 31,119.39 and 12,442.58

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Solution

The fourth proportional to 20,725.50, 31,119.39 and 12,442.58 is: 18,682.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.50 : 31,119.39 = 12,442.58 : x
  2. Step 2: Convert to fraction form
    20,725.50/31,119.39 = 12,442.58/x
  3. Step 3: Cross multiply
    20,725.50x = 31,119.39 × 12,442.58
  4. Step 4: Simplify right side
    20,725.50x = 387,205,344.03
  5. Step 5: Solve for x
    x = 387,205,344.03/20,725.50
  6. Step 6: Final answer
    x = 18,682.56

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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.