Home / 20,817.75-31,210.21-7,662.94

Finding the Fourth Proportional to 20,817.75, 31,210.21 and 7,662.94

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Solution

The fourth proportional to 20,817.75, 31,210.21 and 7,662.94 is: 11,488.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.75 : 31,210.21 = 7,662.94 : x
  2. Step 2: Convert to fraction form
    20,817.75/31,210.21 = 7,662.94/x
  3. Step 3: Cross multiply
    20,817.75x = 31,210.21 × 7,662.94
  4. Step 4: Simplify right side
    20,817.75x = 239,161,966.62
  5. Step 5: Solve for x
    x = 239,161,966.62/20,817.75
  6. Step 6: Final answer
    x = 11,488.37

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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.