Home / 5,135.38-7,087.16-2,897.21

Finding the Fourth Proportional to 5,135.38, 7,087.16 and 2,897.21

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Solution

The fourth proportional to 5,135.38, 7,087.16 and 2,897.21 is: 3,998.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.38 : 7,087.16 = 2,897.21 : x
  2. Step 2: Convert to fraction form
    5,135.38/7,087.16 = 2,897.21/x
  3. Step 3: Cross multiply
    5,135.38x = 7,087.16 × 2,897.21
  4. Step 4: Simplify right side
    5,135.38x = 20,532,990.82
  5. Step 5: Solve for x
    x = 20,532,990.82/5,135.38
  6. Step 6: Final answer
    x = 3,998.34

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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.