Home / 5,138.10-7,090.56-2,780.24

Finding the Fourth Proportional to 5,138.10, 7,090.56 and 2,780.24

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Solution

The fourth proportional to 5,138.10, 7,090.56 and 2,780.24 is: 3,836.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.10 : 7,090.56 = 2,780.24 : x
  2. Step 2: Convert to fraction form
    5,138.10/7,090.56 = 2,780.24/x
  3. Step 3: Cross multiply
    5,138.10x = 7,090.56 × 2,780.24
  4. Step 4: Simplify right side
    5,138.10x = 19,713,458.53
  5. Step 5: Solve for x
    x = 19,713,458.53/5,138.10
  6. Step 6: Final answer
    x = 3,836.72

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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.