Home / 12,720.24-17,542.85-8,239.73

Finding the Fourth Proportional to 12,720.24, 17,542.85 and 8,239.73

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Solution

The fourth proportional to 12,720.24, 17,542.85 and 8,239.73 is: 11,363.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.24 : 17,542.85 = 8,239.73 : x
  2. Step 2: Convert to fraction form
    12,720.24/17,542.85 = 8,239.73/x
  3. Step 3: Cross multiply
    12,720.24x = 17,542.85 × 8,239.73
  4. Step 4: Simplify right side
    12,720.24x = 144,548,218.52
  5. Step 5: Solve for x
    x = 144,548,218.52/12,720.24
  6. Step 6: Final answer
    x = 11,363.64

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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.