Home / 11,212.56-16,821.04-3,315.20

Finding the Fourth Proportional to 11,212.56, 16,821.04 and 3,315.20

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Solution

The fourth proportional to 11,212.56, 16,821.04 and 3,315.20 is: 4,973.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,212.56 : 16,821.04 = 3,315.20 : x
  2. Step 2: Convert to fraction form
    11,212.56/16,821.04 = 3,315.20/x
  3. Step 3: Cross multiply
    11,212.56x = 16,821.04 × 3,315.20
  4. Step 4: Simplify right side
    11,212.56x = 55,765,111.81
  5. Step 5: Solve for x
    x = 55,765,111.81/11,212.56
  6. Step 6: Final answer
    x = 4,973.45

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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.