Home / 8,622.45-12,921.53-3,422.25

Finding the Fourth Proportional to 8,622.45, 12,921.53 and 3,422.25

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Solution

The fourth proportional to 8,622.45, 12,921.53 and 3,422.25 is: 5,128.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.45 : 12,921.53 = 3,422.25 : x
  2. Step 2: Convert to fraction form
    8,622.45/12,921.53 = 3,422.25/x
  3. Step 3: Cross multiply
    8,622.45x = 12,921.53 × 3,422.25
  4. Step 4: Simplify right side
    8,622.45x = 44,220,688.93
  5. Step 5: Solve for x
    x = 44,220,688.93/8,622.45
  6. Step 6: Final answer
    x = 5,128.55

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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.