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Finding the Fourth Proportional to 5,149.70, 7,106.70 and 2,911.70

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Solution

The fourth proportional to 5,149.70, 7,106.70 and 2,911.70 is: 4,018.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,149.70 : 7,106.70 = 2,911.70 : x
  2. Step 2: Convert to fraction form
    5,149.70/7,106.70 = 2,911.70/x
  3. Step 3: Cross multiply
    5,149.70x = 7,106.70 × 2,911.70
  4. Step 4: Simplify right side
    5,149.70x = 20,692,578.39
  5. Step 5: Solve for x
    x = 20,692,578.39/5,149.70
  6. Step 6: Final answer
    x = 4,018.21

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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.