Home / 5,416.78-8,118.62-2,639.30

Finding the Fourth Proportional to 5,416.78, 8,118.62 and 2,639.30

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Solution

The fourth proportional to 5,416.78, 8,118.62 and 2,639.30 is: 3,955.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,416.78 : 8,118.62 = 2,639.30 : x
  2. Step 2: Convert to fraction form
    5,416.78/8,118.62 = 2,639.30/x
  3. Step 3: Cross multiply
    5,416.78x = 8,118.62 × 2,639.30
  4. Step 4: Simplify right side
    5,416.78x = 21,427,473.77
  5. Step 5: Solve for x
    x = 21,427,473.77/5,416.78
  6. Step 6: Final answer
    x = 3,955.76

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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.