Home / 7,875.12-11,809.90-2,609.21

Finding the Fourth Proportional to 7,875.12, 11,809.90 and 2,609.21

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Solution

The fourth proportional to 7,875.12, 11,809.90 and 2,609.21 is: 3,912.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,875.12 : 11,809.90 = 2,609.21 : x
  2. Step 2: Convert to fraction form
    7,875.12/11,809.90 = 2,609.21/x
  3. Step 3: Cross multiply
    7,875.12x = 11,809.90 × 2,609.21
  4. Step 4: Simplify right side
    7,875.12x = 30,814,541.97
  5. Step 5: Solve for x
    x = 30,814,541.97/7,875.12
  6. Step 6: Final answer
    x = 3,912.90

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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.