Home / 5,135.51-7,086.97-2,897.40

Finding the Fourth Proportional to 5,135.51, 7,086.97 and 2,897.40

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Solution

The fourth proportional to 5,135.51, 7,086.97 and 2,897.40 is: 3,998.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.51 : 7,086.97 = 2,897.40 : x
  2. Step 2: Convert to fraction form
    5,135.51/7,086.97 = 2,897.40/x
  3. Step 3: Cross multiply
    5,135.51x = 7,086.97 × 2,897.40
  4. Step 4: Simplify right side
    5,135.51x = 20,533,786.88
  5. Step 5: Solve for x
    x = 20,533,786.88/5,135.51
  6. Step 6: Final answer
    x = 3,998.39

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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.