Home / 5,138.58-7,090.90-2,900.55

Finding the Fourth Proportional to 5,138.58, 7,090.90 and 2,900.55

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Solution

The fourth proportional to 5,138.58, 7,090.90 and 2,900.55 is: 4,002.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.58 : 7,090.90 = 2,900.55 : x
  2. Step 2: Convert to fraction form
    5,138.58/7,090.90 = 2,900.55/x
  3. Step 3: Cross multiply
    5,138.58x = 7,090.90 × 2,900.55
  4. Step 4: Simplify right side
    5,138.58x = 20,567,502.74
  5. Step 5: Solve for x
    x = 20,567,502.74/5,138.58
  6. Step 6: Final answer
    x = 4,002.57

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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.