Home / 5,138.19-7,090.90-2,900.14

Finding the Fourth Proportional to 5,138.19, 7,090.90 and 2,900.14

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Solution

The fourth proportional to 5,138.19, 7,090.90 and 2,900.14 is: 4,002.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.19 : 7,090.90 = 2,900.14 : x
  2. Step 2: Convert to fraction form
    5,138.19/7,090.90 = 2,900.14/x
  3. Step 3: Cross multiply
    5,138.19x = 7,090.90 × 2,900.14
  4. Step 4: Simplify right side
    5,138.19x = 20,564,633.95
  5. Step 5: Solve for x
    x = 20,564,633.95/5,138.19
  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.