Home / 8,720.10-13,078.71-4,039.92

Finding the Fourth Proportional to 8,720.10, 13,078.71 and 4,039.92

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Solution

The fourth proportional to 8,720.10, 13,078.71 and 4,039.92 is: 6,059.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.10 : 13,078.71 = 4,039.92 : x
  2. Step 2: Convert to fraction form
    8,720.10/13,078.71 = 4,039.92/x
  3. Step 3: Cross multiply
    8,720.10x = 13,078.71 × 4,039.92
  4. Step 4: Simplify right side
    8,720.10x = 52,836,942.10
  5. Step 5: Solve for x
    x = 52,836,942.10/8,720.10
  6. Step 6: Final answer
    x = 6,059.21

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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.