Home / 8,520.15-12,785.69-4,135.21

Finding the Fourth Proportional to 8,520.15, 12,785.69 and 4,135.21

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Solution

The fourth proportional to 8,520.15, 12,785.69 and 4,135.21 is: 6,205.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.15 : 12,785.69 = 4,135.21 : x
  2. Step 2: Convert to fraction form
    8,520.15/12,785.69 = 4,135.21/x
  3. Step 3: Cross multiply
    8,520.15x = 12,785.69 × 4,135.21
  4. Step 4: Simplify right side
    8,520.15x = 52,871,513.14
  5. Step 5: Solve for x
    x = 52,871,513.14/8,520.15
  6. Step 6: Final answer
    x = 6,205.47

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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.