Home / 20,964.20-31,412.70-11,090.60

Finding the Fourth Proportional to 20,964.20, 31,412.70 and 11,090.60

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Solution

The fourth proportional to 20,964.20, 31,412.70 and 11,090.60 is: 16,618.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.20 : 31,412.70 = 11,090.60 : x
  2. Step 2: Convert to fraction form
    20,964.20/31,412.70 = 11,090.60/x
  3. Step 3: Cross multiply
    20,964.20x = 31,412.70 × 11,090.60
  4. Step 4: Simplify right side
    20,964.20x = 348,385,690.62
  5. Step 5: Solve for x
    x = 348,385,690.62/20,964.20
  6. Step 6: Final answer
    x = 16,618.12

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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.