Home / 3,420.78-5,127.96-3,116.44

Finding the Fourth Proportional to 3,420.78, 5,127.96 and 3,116.44

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Solution

The fourth proportional to 3,420.78, 5,127.96 and 3,116.44 is: 4,671.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.78 : 5,127.96 = 3,116.44 : x
  2. Step 2: Convert to fraction form
    3,420.78/5,127.96 = 3,116.44/x
  3. Step 3: Cross multiply
    3,420.78x = 5,127.96 × 3,116.44
  4. Step 4: Simplify right side
    3,420.78x = 15,980,979.66
  5. Step 5: Solve for x
    x = 15,980,979.66/3,420.78
  6. Step 6: Final answer
    x = 4,671.74

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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.