Home / 5,138.08-7,090.50-2,780.17

Finding the Fourth Proportional to 5,138.08, 7,090.50 and 2,780.17

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Solution

The fourth proportional to 5,138.08, 7,090.50 and 2,780.17 is: 3,836.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.08 : 7,090.50 = 2,780.17 : x
  2. Step 2: Convert to fraction form
    5,138.08/7,090.50 = 2,780.17/x
  3. Step 3: Cross multiply
    5,138.08x = 7,090.50 × 2,780.17
  4. Step 4: Simplify right side
    5,138.08x = 19,712,795.39
  5. Step 5: Solve for x
    x = 19,712,795.39/5,138.08
  6. Step 6: Final answer
    x = 3,836.61

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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.