Home / 12,542.88-18,811.62-5,140.20

Finding the Fourth Proportional to 12,542.88, 18,811.62 and 5,140.20

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Solution

The fourth proportional to 12,542.88, 18,811.62 and 5,140.20 is: 7,709.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,542.88 : 18,811.62 = 5,140.20 : x
  2. Step 2: Convert to fraction form
    12,542.88/18,811.62 = 5,140.20/x
  3. Step 3: Cross multiply
    12,542.88x = 18,811.62 × 5,140.20
  4. Step 4: Simplify right side
    12,542.88x = 96,695,489.12
  5. Step 5: Solve for x
    x = 96,695,489.12/12,542.88
  6. Step 6: Final answer
    x = 7,709.19

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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.