Home / 20,918.20-31,377.30-9,832.54

Finding the Fourth Proportional to 20,918.20, 31,377.30 and 9,832.54

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Solution

The fourth proportional to 20,918.20, 31,377.30 and 9,832.54 is: 14,748.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.20 : 31,377.30 = 9,832.54 : x
  2. Step 2: Convert to fraction form
    20,918.20/31,377.30 = 9,832.54/x
  3. Step 3: Cross multiply
    20,918.20x = 31,377.30 × 9,832.54
  4. Step 4: Simplify right side
    20,918.20x = 308,518,557.34
  5. Step 5: Solve for x
    x = 308,518,557.34/20,918.20
  6. Step 6: Final answer
    x = 14,748.81

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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.