Home / 5,138.42-7,090.89-2,900.28

Finding the Fourth Proportional to 5,138.42, 7,090.89 and 2,900.28

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Solution

The fourth proportional to 5,138.42, 7,090.89 and 2,900.28 is: 4,002.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.42 : 7,090.89 = 2,900.28 : x
  2. Step 2: Convert to fraction form
    5,138.42/7,090.89 = 2,900.28/x
  3. Step 3: Cross multiply
    5,138.42x = 7,090.89 × 2,900.28
  4. Step 4: Simplify right side
    5,138.42x = 20,565,578.53
  5. Step 5: Solve for x
    x = 20,565,578.53/5,138.42
  6. Step 6: Final answer
    x = 4,002.31

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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.