Home / 20,917.90-31,355.79-9,229.06

Finding the Fourth Proportional to 20,917.90, 31,355.79 and 9,229.06

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Solution

The fourth proportional to 20,917.90, 31,355.79 and 9,229.06 is: 13,834.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.90 : 31,355.79 = 9,229.06 : x
  2. Step 2: Convert to fraction form
    20,917.90/31,355.79 = 9,229.06/x
  3. Step 3: Cross multiply
    20,917.90x = 31,355.79 × 9,229.06
  4. Step 4: Simplify right side
    20,917.90x = 289,384,467.26
  5. Step 5: Solve for x
    x = 289,384,467.26/20,917.90
  6. Step 6: Final answer
    x = 13,834.30

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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.