Home / 8,715.24-12,025.80-5,179.86

Finding the Fourth Proportional to 8,715.24, 12,025.80 and 5,179.86

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Solution

The fourth proportional to 8,715.24, 12,025.80 and 5,179.86 is: 7,147.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.24 : 12,025.80 = 5,179.86 : x
  2. Step 2: Convert to fraction form
    8,715.24/12,025.80 = 5,179.86/x
  3. Step 3: Cross multiply
    8,715.24x = 12,025.80 × 5,179.86
  4. Step 4: Simplify right side
    8,715.24x = 62,291,960.39
  5. Step 5: Solve for x
    x = 62,291,960.39/8,715.24
  6. Step 6: Final answer
    x = 7,147.48

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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.