Home / 5,138.90-7,089.78-3,797.74

Finding the Fourth Proportional to 5,138.90, 7,089.78 and 3,797.74

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Solution

The fourth proportional to 5,138.90, 7,089.78 and 3,797.74 is: 5,239.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.90 : 7,089.78 = 3,797.74 : x
  2. Step 2: Convert to fraction form
    5,138.90/7,089.78 = 3,797.74/x
  3. Step 3: Cross multiply
    5,138.90x = 7,089.78 × 3,797.74
  4. Step 4: Simplify right side
    5,138.90x = 26,925,141.10
  5. Step 5: Solve for x
    x = 26,925,141.10/5,138.90
  6. Step 6: Final answer
    x = 5,239.48

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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.