Home / 3,710.25-5,120.15-2,138.45

Finding the Fourth Proportional to 3,710.25, 5,120.15 and 2,138.45

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Solution

The fourth proportional to 3,710.25, 5,120.15 and 2,138.45 is: 2,951.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,710.25 : 5,120.15 = 2,138.45 : x
  2. Step 2: Convert to fraction form
    3,710.25/5,120.15 = 2,138.45/x
  3. Step 3: Cross multiply
    3,710.25x = 5,120.15 × 2,138.45
  4. Step 4: Simplify right side
    3,710.25x = 10,949,148.47
  5. Step 5: Solve for x
    x = 10,949,148.47/3,710.25
  6. Step 6: Final answer
    x = 2,951.05

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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.