Home / 7,821.31-11,731.53-2,199.35

Finding the Fourth Proportional to 7,821.31, 11,731.53 and 2,199.35

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Solution

The fourth proportional to 7,821.31, 11,731.53 and 2,199.35 is: 3,298.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.31 : 11,731.53 = 2,199.35 : x
  2. Step 2: Convert to fraction form
    7,821.31/11,731.53 = 2,199.35/x
  3. Step 3: Cross multiply
    7,821.31x = 11,731.53 × 2,199.35
  4. Step 4: Simplify right side
    7,821.31x = 25,801,740.51
  5. Step 5: Solve for x
    x = 25,801,740.51/7,821.31
  6. Step 6: Final answer
    x = 3,298.90

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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.