Home / 8,255.21-12,380.31-2,989.58

Finding the Fourth Proportional to 8,255.21, 12,380.31 and 2,989.58

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Solution

The fourth proportional to 8,255.21, 12,380.31 and 2,989.58 is: 4,483.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,255.21 : 12,380.31 = 2,989.58 : x
  2. Step 2: Convert to fraction form
    8,255.21/12,380.31 = 2,989.58/x
  3. Step 3: Cross multiply
    8,255.21x = 12,380.31 × 2,989.58
  4. Step 4: Simplify right side
    8,255.21x = 37,011,927.17
  5. Step 5: Solve for x
    x = 37,011,927.17/8,255.21
  6. Step 6: Final answer
    x = 4,483.46

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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.