Home / 3,937.20-5,906.40-1,339.53

Finding the Fourth Proportional to 3,937.20, 5,906.40 and 1,339.53

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Solution

The fourth proportional to 3,937.20, 5,906.40 and 1,339.53 is: 2,009.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,937.20 : 5,906.40 = 1,339.53 : x
  2. Step 2: Convert to fraction form
    3,937.20/5,906.40 = 1,339.53/x
  3. Step 3: Cross multiply
    3,937.20x = 5,906.40 × 1,339.53
  4. Step 4: Simplify right side
    3,937.20x = 7,911,772.82
  5. Step 5: Solve for x
    x = 7,911,772.82/3,937.20
  6. Step 6: Final answer
    x = 2,009.49

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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.