Home / 20,821.72-31,218.74-11,466.14

Finding the Fourth Proportional to 20,821.72, 31,218.74 and 11,466.14

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Solution

The fourth proportional to 20,821.72, 31,218.74 and 11,466.14 is: 17,191.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.72 : 31,218.74 = 11,466.14 : x
  2. Step 2: Convert to fraction form
    20,821.72/31,218.74 = 11,466.14/x
  3. Step 3: Cross multiply
    20,821.72x = 31,218.74 × 11,466.14
  4. Step 4: Simplify right side
    20,821.72x = 357,958,612.60
  5. Step 5: Solve for x
    x = 357,958,612.60/20,821.72
  6. Step 6: Final answer
    x = 17,191.60

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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.