Home / 11,781.40-17,672.10-7,634.20

Finding the Fourth Proportional to 11,781.40, 17,672.10 and 7,634.20

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Solution

The fourth proportional to 11,781.40, 17,672.10 and 7,634.20 is: 11,451.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,781.40 : 17,672.10 = 7,634.20 : x
  2. Step 2: Convert to fraction form
    11,781.40/17,672.10 = 7,634.20/x
  3. Step 3: Cross multiply
    11,781.40x = 17,672.10 × 7,634.20
  4. Step 4: Simplify right side
    11,781.40x = 134,912,345.82
  5. Step 5: Solve for x
    x = 134,912,345.82/11,781.40
  6. Step 6: Final answer
    x = 11,451.30

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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.