Home / 8,415.28-12,622.56-3,220.84

Finding the Fourth Proportional to 8,415.28, 12,622.56 and 3,220.84

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Solution

The fourth proportional to 8,415.28, 12,622.56 and 3,220.84 is: 4,831.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.28 : 12,622.56 = 3,220.84 : x
  2. Step 2: Convert to fraction form
    8,415.28/12,622.56 = 3,220.84/x
  3. Step 3: Cross multiply
    8,415.28x = 12,622.56 × 3,220.84
  4. Step 4: Simplify right side
    8,415.28x = 40,655,246.15
  5. Step 5: Solve for x
    x = 40,655,246.15/8,415.28
  6. Step 6: Final answer
    x = 4,831.12

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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.