Home / 8,660.21-12,987.09-3,112.04

Finding the Fourth Proportional to 8,660.21, 12,987.09 and 3,112.04

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Solution

The fourth proportional to 8,660.21, 12,987.09 and 3,112.04 is: 4,666.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.21 : 12,987.09 = 3,112.04 : x
  2. Step 2: Convert to fraction form
    8,660.21/12,987.09 = 3,112.04/x
  3. Step 3: Cross multiply
    8,660.21x = 12,987.09 × 3,112.04
  4. Step 4: Simplify right side
    8,660.21x = 40,416,278.63
  5. Step 5: Solve for x
    x = 40,416,278.63/8,660.21
  6. Step 6: Final answer
    x = 4,666.90

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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.