Home / 8,720.60-12,035.43-5,183.78

Finding the Fourth Proportional to 8,720.60, 12,035.43 and 5,183.78

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Solution

The fourth proportional to 8,720.60, 12,035.43 and 5,183.78 is: 7,154.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.60 : 12,035.43 = 5,183.78 : x
  2. Step 2: Convert to fraction form
    8,720.60/12,035.43 = 5,183.78/x
  3. Step 3: Cross multiply
    8,720.60x = 12,035.43 × 5,183.78
  4. Step 4: Simplify right side
    8,720.60x = 62,388,961.15
  5. Step 5: Solve for x
    x = 62,388,961.15/8,720.60
  6. Step 6: Final answer
    x = 7,154.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.