Home / 8,385.72-12,579.90-2,542.20

Finding the Fourth Proportional to 8,385.72, 12,579.90 and 2,542.20

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Solution

The fourth proportional to 8,385.72, 12,579.90 and 2,542.20 is: 3,813.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.72 : 12,579.90 = 2,542.20 : x
  2. Step 2: Convert to fraction form
    8,385.72/12,579.90 = 2,542.20/x
  3. Step 3: Cross multiply
    8,385.72x = 12,579.90 × 2,542.20
  4. Step 4: Simplify right side
    8,385.72x = 31,980,621.78
  5. Step 5: Solve for x
    x = 31,980,621.78/8,385.72
  6. Step 6: Final answer
    x = 3,813.70

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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.