Home / 3,747.90-5,621.85-1,115.40

Finding the Fourth Proportional to 3,747.90, 5,621.85 and 1,115.40

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Solution

The fourth proportional to 3,747.90, 5,621.85 and 1,115.40 is: 1,673.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,747.90 : 5,621.85 = 1,115.40 : x
  2. Step 2: Convert to fraction form
    3,747.90/5,621.85 = 1,115.40/x
  3. Step 3: Cross multiply
    3,747.90x = 5,621.85 × 1,115.40
  4. Step 4: Simplify right side
    3,747.90x = 6,270,611.49
  5. Step 5: Solve for x
    x = 6,270,611.49/3,747.90
  6. Step 6: Final answer
    x = 1,673.10

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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.