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Finding the Fourth Proportional to 5,642.34, 7,786.40 and 3,158.34

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Solution

The fourth proportional to 5,642.34, 7,786.40 and 3,158.34 is: 4,358.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642.34 : 7,786.40 = 3,158.34 : x
  2. Step 2: Convert to fraction form
    5,642.34/7,786.40 = 3,158.34/x
  3. Step 3: Cross multiply
    5,642.34x = 7,786.40 × 3,158.34
  4. Step 4: Simplify right side
    5,642.34x = 24,592,067.54
  5. Step 5: Solve for x
    x = 24,592,067.54/5,642.34
  6. Step 6: Final answer
    x = 4,358.49

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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.