Home / 8,171.38-12,259.95-2,977.78

Finding the Fourth Proportional to 8,171.38, 12,259.95 and 2,977.78

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Solution

The fourth proportional to 8,171.38, 12,259.95 and 2,977.78 is: 4,467.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,171.38 : 12,259.95 = 2,977.78 : x
  2. Step 2: Convert to fraction form
    8,171.38/12,259.95 = 2,977.78/x
  3. Step 3: Cross multiply
    8,171.38x = 12,259.95 × 2,977.78
  4. Step 4: Simplify right side
    8,171.38x = 36,507,433.91
  5. Step 5: Solve for x
    x = 36,507,433.91/8,171.38
  6. Step 6: Final answer
    x = 4,467.72

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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.