Home / 20,843.56-31,203.78-13,425.85

Finding the Fourth Proportional to 20,843.56, 31,203.78 and 13,425.85

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Solution

The fourth proportional to 20,843.56, 31,203.78 and 13,425.85 is: 20,099.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.56 : 31,203.78 = 13,425.85 : x
  2. Step 2: Convert to fraction form
    20,843.56/31,203.78 = 13,425.85/x
  3. Step 3: Cross multiply
    20,843.56x = 31,203.78 × 13,425.85
  4. Step 4: Simplify right side
    20,843.56x = 418,937,269.71
  5. Step 5: Solve for x
    x = 418,937,269.71/20,843.56
  6. Step 6: Final answer
    x = 20,099.12

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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.