Home / 8,486.28-12,720.66-3,558.78

Finding the Fourth Proportional to 8,486.28, 12,720.66 and 3,558.78

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Solution

The fourth proportional to 8,486.28, 12,720.66 and 3,558.78 is: 5,334.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.28 : 12,720.66 = 3,558.78 : x
  2. Step 2: Convert to fraction form
    8,486.28/12,720.66 = 3,558.78/x
  3. Step 3: Cross multiply
    8,486.28x = 12,720.66 × 3,558.78
  4. Step 4: Simplify right side
    8,486.28x = 45,270,030.39
  5. Step 5: Solve for x
    x = 45,270,030.39/8,486.28
  6. Step 6: Final answer
    x = 5,334.50

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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.